Category Archives: Science & Technology

History Undusted – The Tactile Language of the Quipu

Throughout history, languages have come and gone; an estimated 30,000 have existed at some point in time, though currently, there are roughly 6,000 to 7,000 languages in use – and most are threatened with extinction. Think about that. The impact on the loss of cultural history, connection to ways of thinking, ways of communicating, and ways of processing information; senses of humour, and national heritages will be lost.

An example of a language nearly lost, but which is now familiar to most of us by sight, is the logogram language of Egyptian hieroglyphs. The knowledge of how to interpret the symbols had been lost for centuries, until 1799, when a stone was found near Rosetta, along the Nile Delta in Egypt; the stone was a stele with a decree issued in 196 BC; the texts carved into the stone were Ancient Egyptian (“demotic” text), hieroglyphs, and Ancient Greek. Because Greek was a known language, they could use the Rosetta stone to decipher the forgotten languages.

When we think of writing, we may think of various alphabets: Greek, Roman (of which English makes use), Norse Runes, or the logographic or ideographic languages of Asia, such as Chinese or Japanese, or the cuneiform writing of the Ancient Near East. But did you know that there have been languages based on string?

Quipu in the Museo Machu Picchu, Casa Concha, Cusco. Source: Wikipedia

The Inca people, in the region of modern Peru and Chile, used knots on an elaborate system of connected strings or cords for collecting data, keeping records, recording taxes or census records, making calendars, or for military organisation. When the Spanish Conquistadors swept through, they found numerous bundles of strings, but had no idea of their significance; they destroyed many of the quipu*, not realizing that they might have held in their hands a record of an individual’s wealth in animals or crops. [*Quipu is the Spanish spelling used in English; it is also spelled khipu or kipu.] Other cultures have also used similar concepts with knotted strings to record information, unrelated to South America; these include China, Japan, Taiwan New Zealand, Hawaii, and other parts of Polynesia.

As with most textiles, they unfortunately didn’t stand the test of time very well, and only a fraction remains today. The ancient world may have taken the concept of the quipu one step further in creating the more flexible abacus, though the latter was (and is still) used for temporary calculations, while the former was rather for recording information. Whether or not there is a historical link, both are visual tools that can be used for similar functions to a certain extent.

Even with such widespread use of these knotting records, their meaning was nearly lost, until a Harvard student, Manny Madrano, had time on his hands one summer and solved a centuries-old mystery!

For an interesting video on this topic, please click here. I hope you’ve learned something! Keep being curious about our fascinating world!

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Filed under Etymology, History, History Undusted, Liguistics, Science & Technology, YouTube Link

Nature Undusted: The Phenomena of Ghost Lights

Pixar’s “Brave”, showing will-o’-the-wisps.

Back in January, I wrote about the phenomenon of the Hum, something that occurs around the world.

Another global phenomenon is that of “ghost lights,” also known as fata morgana, mirages (both inferior and superior), will-o’-the-wisps, fairy fires, or ignis fatuus (“foolish flame”).

I grew up in a climate zone with hot, dry summers and wide, flat highways that stretched to the horizon. On a hot summer day, you could see the cab of a semi-truck floating mid-air for some distance before you actually saw the truck finally touch the ground. Sometimes the highway would look flooded – this kind of water mirage is also a danger in desert regions. Death Valley is dangerous, not only because of the heat but also because of disorienting mirages.

Ghost Lights can have a variety of natural causes: methane gas combustion or other organic decay which can cause photon emissions (these lights often appear over swamp or boggy areas); light refraction in certain atmospheric conditions that cause the lights of cars on distant roads or firelights from campfires to “float” midair (like the semi-truck cab above); it may also be caused by the bioluminescence of various micro-organisms and insects.

Here are a few well-known lights:

Marfa Lights

Hornet Spooklight

Gurdon Light

Brown Mountain Lights

Hessdalen Lights

Min Min Light

Naga Fireballs (Thailand)

Palatine Light

Paulding Light

Chir Batti

St. Louis Ghost Train (Canada)

 plus many more!

For a fun dive into these phenomena, the Why Files has a video covering the topic (the actual content starts at 4:15); I enjoy his videos because the author in me likes the way he sets stories up as real – as if reporting facts – before he debunks them or offers probable explanations. While he knows that many people likely believe in the stories he eventually debunks, he goes about it in a respectful, tongue-in-cheek way.

For a shorter video on the topic, Joe Scott has an interesting one.

Have you ever seen any of these lights, or experienced mirages? If so, please tell us about it in the comments below!

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Yuka: Shaken Awake

All of us can relate to having some form of ruts in our lives: Favourite meals, restaurants, seats in places we visit often, clothes we prefer, products we buy, food brands or makeup brands (if you wear it); all, patterns of movement or place or things. Recently, I heard of an app that made me curious to try it out; when I did, it was an eye-opener about how many things I use that I’ve taken for granted that their claims are accurate – I know that’s naïve, but part of that naivety is that greatest of marketing tools, willful ignorance.

Case in point: Speaking to the women out there, you probably have favourite makeup products or brands that you’re used to. But what if you found out that half of their ingredients build up in your system, damaging your liver, your thyroid, and the environment? That’s exactly what I have learned lately, and it’s shaken me awake: the app I cannot recommend highly enough is called Yuka. If I had known years ago what I know now, perhaps I would still have a thyroid; tumours put an end to that several years ago – but I can prevent further damage to my body by being aware of what’s in a product and buying safe alternatives.

The app works like this: You scan a product’s barcode – anything from food items to makeup to body products such as shampoos and hand creams; the app then ranks the products on a set list of 100 points and tells you whether it’s excellent, good, poor or bad; it then lists the ingredients and gives you the option to read more about each one, ranking the ingredients (colour-coded) as hazardous, moderate risk, low risk, or risk-free. If the products rank as poor or bad, below them will be a list of alternative products, with their rankings and ingredients for further information. The recommendations are unbiased as they are not supported by any company. The app also keeps a record of products I’ve already scanned; if I’m at the store, and scan products I don’t buy because of their rating, I can then delete one or several items from the list to keep it streamlined to my products/foods.

There are things that this app is NOT: It is not a substitute for medical or nutritional advice; it is not the be-all and end-all for telling you what to buy. But what it IS: A good guide to weighing the benefits vs. the disadvantages of using one product over another. Some of my products may clock in as “poor” – but when I consider why that rating is given, I may decide to continue its use until something better becomes available in my area.

For me, I’ve found that one ingredient pops up in most makeup and hair products: Phenoxyethanol; it is listed as a potential endocrine disruptor, potential allergen, and irritant. In the EU its use in cosmetics is regulated – but not in the USA or in Canada. In itself it may be within regulatory limits in a product; but accumulatively (several products, from shower gel to lip balm to foundation) it exceeds the limit and becomes a health concern. Knowing this has helped me find new, healthier products. Even within a product range, the ingredients may vary; for example, one lip balm may be good, but another colour of the same brand differs to produce the colour or gloss and ends up being listed as bad. Honestly, I won’t buy a product now without knowing it’s healthy. It’s not that I can’t and won’t think for myself and let an app tell me what to do, but I can use it to weigh a decision.

This past week, I wanted to find a lip gloss to replace the one I’d been using which was marked as “hazardous”; but the store I was in didn’t have customer wi-fi, so I bought a small Vaseline, thinking, “This has been around for ages, so it must be simple and safe”. Wrong. When I got home, I scanned it: Petrolatum is the mineral oil used, which has a moderate risk with a big BUT: this oil may contain problematic residues, such as MOAHs (genotoxic carcinogens which promote cancers and damage DNA) and MOSHs (these accumulate in the body, particularly lymph nodes and the liver). These oils should be avoided, especially in products that may be ingested… such as lip balms (and these two residues were present in half of all tested lip balms!) So now, that little jar is in my craft room to be used as a lubricant for my tools.

We all need to take steps to protect ourselves; big companies are not putting customers first, but customers’ wallets. If we don’t shake ourselves awake and work against our own willful ignorance, we shouldn’t be surprised when health issues pop up; but who would associate lip balms and blush and hand creams or canned foods and pre-made packaged food with those bigger issues? We need to start looking into it for our own sakes.

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Filed under Articles, Humanity Highlights, Links to External Articles, Musings, Research, Science & Technology

Fieldnotes

A few months ago, I began something that has added a layer of creativity and organisation to my life which, to be honest, is fairly creative and organised as it is. But this little addition adds a nice colour: Fieldnotes.

The original concept of taking fieldnotes comes from the scientific disciplines: An archaeologist in the field, taking notes on where, what and when something was uncovered; a geologist, botanist, ornithologist, or entomologist taking notes on observations, perhaps drawing an illustration of a specimen or a map of the landscape.

Fieldnotes can include writing, diagrams, drawings, or visual clues within an entry such as arrows or other visual connectors. They differ from a daily journal in that the fieldnotes are concise… rambling or expanding on a thought belongs elsewhere, but not in a “quick-draw” situation (pun intended).

Creative thinkers have jumped on the idea for reasons other than scientific observation: As a writer, fieldnotes help me capture snippets of ideas, dialogue, or an observation when out in public (I love to people-watch), or something I read – sometimes the comments on YouTube videos are a great capsule of humour! I also use fieldnotes to keep track of tasks on a busy day – lists of to-dos, to-writes, and so on. When I have a creative project, I take notes on the steps taken – such as making giant flowers that no one else has ever made; how to scale up a smaller version of a crepe paper flower is not always straightforward, and if I have several to make, it helps to have those detailed notes of the prototype phase for the next time around.

Taking fieldnotes might help get your creative juices flowing. If you’d like to start this practice, here are a few tips:

  1. Use a small notebook – one that can fit into a shirt pocket, man-bag, or purse. I’ve made my own with 70gsm blank paper, which allows me to make the same size and style repeatedly. But if you can’t do that, just use something like a moleskin notebook; these come in various sizes, with or without lined pages. There is also a company with books called Field Notes, though they seem a bit pricey for what you can do on your own…
  2. Use a good pen, or pencil, or coloured pencils if you want to sketch something with colour.
  3. You can either take chronological notes, such as dating each entry, or you can organise your notes into groupings: One page per character, scene or topic, or for a to-do list, or whatever you want to capture on the go.
  4. Use visual cues, such as boxes around certain elements or arrows connecting one thing to another. Use illustrations or draw diagrams; attach images from magazines, printouts, etc.
  5. Highlight tags or keywords; consider numbering each page and keeping an index at the back of the book to help you find things later on.
  6. One book that might help kick-start illustrative note-taking if it’s new to you is The Sketchnote Handbook, by Mike Rohde.
  7. Think about how you’re recording things on the page: Do you always want to write straight, top left to bottom right, or do you want to mix things up and write diagonally, sideways, or even backwards? Yes, sometimes that’s a thing; Leonardo da Vinci wrote privately in a mirrored direction, only writing normally when he wanted others to read his notes; he also developed his own shorthand.
Leonardo da Vinci’s Vitruvian Man, with mirrored writing.

I also have my own shorthand for many things; Sometimes I use what I call pigeon Asian (I use this when I don’t want anyone else to read it); it’s something I learned when living in Hawaii. It looks like Kanji (the logographic writing of Japan), but it’s not – that’s all I’ll explain! I also use logographs, such as the ancient Anglo-Saxon rune of daeg, which includes the concept of day, dawn, intuition or breakthrough; I use this to designate those times when I’m writing: Rather than writing, “Today, I wrote/worked on the manuscript for...” I just write that symbol plus the name of the manuscript and details. I have a whole series of such shorthand symbols that I use daily.

While there are note-taking apps available (and I use one, called “Keep My Notes”, on my phone for things like shopping lists or feedback notes for singing students or bands that I take during performances and review with them later), sometimes it’s helpful to get away from digital screens. Sometimes I’ll write whole scenes away from the computer – I don’t use my fieldnotes for that, though it will probably be used to outline a scene that comes to mind until I get to another notebook. Something about writing long-hand sparks a level of creativity that might not come while working at a computer; hand-eye coordination should never be underestimated in creative endeavours. Once a scene has developed enough away from the screen to be integrated into my current manuscript, it then takes on another reiteration as I type it in, tweaking and changing… it’s what I call a “ripening process” as a wine metaphor for the creative maturing process a scene goes through by this method. It gets my head into a new space figuratively, literally, and literarily!

In an age when we are constantly bombarded with visuals wherever we go, sometimes it’s healthy to go back to good ol’ pen and paper. On those days so busy that I can’t remember what I’ve actually done, it’s helpful to look back at my fieldnotes as I write out my thoughts in my daily journal.

Do you write? Do you ever make lists for shopping, chores, people to contact, or things to do? If so, how have you kept track of such things so far? If it’s a system that works for you, brilliant! But if you find yourself wanting to switch things up or wanting to improve your use of time, would you consider taking fieldnotes? Please comment below!

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Filed under Articles, Etymology, Humanity Highlights, Links to External Articles, Lists, Musings, Nuts & Bolts, Research, Science & Technology, Writing Exercise, Writing Prompt

How It’s Made: Fireworks

Around the world, fireworks are a traditional part of certain celebrations: Here in Switzerland, the two national nights would be the 1st of August (1291, Independence Day), and New Year’s Eve. In America, the 4th of July is probably the most widespread fireworks night. In Japan, fireworks competitions are enjoyed by spectators during the Sumidagawa Firework Festival, and in India, it’s Diwali, the Festival of Lights. In many countries in South America, Christmas is the big night; in Britain, Guy Fawkes Night is celebrated with both fireworks and bonfires (in Scotland); he was most associated with a failed gunpowder plot intended to blow up parliament and assassinate King James I of Scotland / James IV of England and Ireland.

Most people have, at some time in their lives, seen fireworks go off; but most people have no idea how they produce varying shapes and colours. Derek Muller, aka Youtuber of the Veritasium channel, goes into the details of what makes fireworks take shape, have varying colours and enable them to have precision timing in displays. To watch the video, called “The Hidden Science of Fireworks”, which includes footage of a drone’s perspective amid a fireworks display, just click on the image below! Enjoy!

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History Undusted: Keys

Some people collect things like stamps, postcards, or coins. I’m drawn to unique doors, locks, and keys.

Keys are something everyone has; whether it’s a house key, a car key, or an inner door key. Modern keys come in several forms: Lever (usually used in padlocks or furniture), pin tumbler, dimple, computerized laser (often used in cars), Nutech, cross, skeleton, barrel, transponder, cards, Abloy, and many more.

We tend to think of skeleton keys as antiquated, but here in Switzerland, even modern room doors within a home have skeleton keys for their locks (though we use dimple keys on main doors). Even though they’re still used, skeleton keys are one of the oldest forms of keys in history. The Romans had elaborate keys that were nearly as wide as they were long, but they already had the typical ringed head we think of when we think of a skeleton key; it made it easy to slip in a finger and pull the key out of the lock.

Roman Key Latch as old as 1st Century AD – Metmuseum

The oldest key found was in the ruins of Ninevah (the capital of ancient Assyria), going back to around 4,000 BC. It was a simple wooden prodder inserted into a hole in a door to lift pegs within a wooden bar used to hold the door securely from the inside; it could only be secured from the inside and was easy to open with any pegged stick. This type of wooden pin lock was common in ancient Egypt, but they’ve also been found in places like Japan and Scandinavia. It is alluded to in the Bible in such passages as Nehemiah 3:3,6,13-15 or Isaiah 22:22-23.

Ancient wooden peg key lock

The Romans improved on the idea and began making brass and iron keys with the ground-breaking technology of projections (wards) inside the lock that required a specific combination to be opened, thus requiring a specific key. The warded key outlasted the Roman Empire itself by more than a thousand years. Though these locks were easy to pick, no major advancements were made in the design until the late 18th century, when Robert Barron invented a new locking mechanism that we essentially recognize as the tumbler lock. Joseph Bramah improved further on the design a few years later, using a cylindrical key with patterned notches that aligned with the metal slides within the lock. The Bramah lock is still used and sold today (after finishing this article, take a moment on Google Images to search “Bramah lock” – you’ll see a wide range of old and new examples).  In 1818, Jeremiah Chubb improved the design by adding a retaining spring that held back a tumbler when shifted by the turn of the wrong key; this prevented not only the bolt from being lifted but indicated that someone had tried to pick the lock; they were known as detector locks.

Over time, many more improvements and refinements followed, until today’s key styles are so varied that a comprehensive list would be lengthy – there are variations within categories of keys; some cars today no longer even require a key to start. But to adapt the old adage of “where there are horses there are horse thieves”, where there is a lock there will be a lock pick. Even keyless cars are not theft-proof.

How many keys do you use daily? How have key styles changed in your lifetime?

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The Hum

Recently I came across an article on the phenomena of “The Hum” – a low-frequency sound heard by people across the globe. The hums are often given their location’s place name, such as the Taos Hum of New Mexico, the Auckland Hum or the Windsor Hum. While these sounds are clearly heard, no one seems to agree on the source of the sound: It could be produced by electrical equipment, an unfamiliar animal sound (such as the toadfish), the Jet Stream shearing powerline posts, volcanic eruptions, lightning static, ocean wave vibrations, or internal biological auditory signals.

If you stop and listen, there are sounds everywhere. But The Hum is not tinnitus, which has a much higher sound frequency. I’ve had tinnitus for years; when it’s quiet, I can hear up to eight tones of ringing in my ears. It’s something that affects around 15% of the population, but the only time it really becomes an issue is if it triggers a fight-or-flight response in a person – I’ve heard that the more you focus on the ringing, the more you hear it (the more it bothers you). In almost half of the people who have tinnitus, it can lead to phases of anxiety or depression, likely linked to that psychological fear response. Some people don’t even realize they have tinnitus – they automatically, subconsciously distract themselves with sound (music or television being common tactics). The causes of tinnitus vary, but in my case, I know exactly when it started: I was flying from London to Glasgow, and I had a head cold. The flight was just at that altitude where your ears almost pop, and it was excruciating. I can still hear fleas sneeze and “tell you if they’re male or female”, but the ringing is always present – I just ignore it for the most part. I hear so well that I sleep with earplugs each night – otherwise, I can hear electricity in the walls, and a battery charger at the far end of our home sounds like a car alarm to me!

Have you heard The Hum? Do you have tinnitus, and if so, does it bother you in any way or are you able to ignore it?

If you’d like to learn a bit more about The Hum, and what it could be or what it could mean, please click here for a 12-minute BBC report on the issue.

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History Undusted: The Great Clock of Rouen, France

Last summer, my husband and I rented a privately-owned motorhome in Caen, France, and travelled around Normandy for 10 weather-perfect days. One of the places we had on our short list to see was the city of Rouen, a region with a long and rich history. One icon of the city is a clock. Not just any clock. The Great Clock of Rouen.

Rouen was a pivotal location in the Hundred Years’ War (1337-1453 – calling it the “Hundred-and-Sixteen Years’ War” is more accurate but not as catchy, though the name is likely based on the fact that there were periods of fragile truces); the central conflict was the English claim to the French throne. In the context of this war, Joan of Arc became a victim of male chauvinism and political expediency. But that’s another story.

The mechanism of this clock was built in 1389. Let’s put that into perspective: That’s over 100 years before Columbus set out to discover a western passage to the East Indies and inadvertently discovered America; Richard II took over as king of England; it was made during the Hundred Years’ War; Joan of Arc would have seen this clock on her way to her execution (by burning at the stake). It was made more than 190 years before our modern Gregorian calendar replaced the Julian calendar, in 1582.

The mechanism deserved not only a grand position, but a grand façade: The Rouennais aldermen decided that the town needed a clock, and the construction of a tower to house the clock took 9 years; the architect was Jehan de Bayeux, though the tower was completed by his son in 1398. The original designer of the clock’s facades, Jordan Delettre, was no more (whether he died or was removed is unknown), and it was completed by Jean de Felain, who became the first “governor of the clock”, maintaining it in exchange for a home in the clock’s tower. Towers and wars came and went, and the clock survived; it was moved to its current location in 1410, now housed astride an ornately carved stone archway.

The clock faces (on both sides of a stone archway and connected to a central mechanism shared by both) are 2.5 metres (over 8 feet) in diameter, and each has only a single hand, tipped with the depiction of a lamb, which shows the hour; moon phases are indicated in the 30 cm oculus above the clock face, which makes a full rotation every 29 days. The face depicts 24 rays of the sun surrounded by a dark blue starry frame. A hand which shows the day of the week is located in an opening at the base of the dial, with each day represented by a different Greek god: Diane as the moon (Monday), Mars (Tuesday), Mercury (Wednesday), Jupiter (Thursday), Venus (Friday), Saturn (Saturday) and Apollo (Sunday).

Although the mechanism of the clock still works, it has been powered by electricity since 1928, and the tower itself was renovated in the late 1990s.

Underneath the clock in the centre of the archway, the coat of arms of Rouen can be seen: It depicts the Paschal lamb on a red background (the official colour of Rouen); it is held by two angels (if you look closely at the angel on the right, you’ll notice that its head is on wrong; it is thought to be due to disgruntled construction workers – obviously an age-old problem…). Beneath the arch are elaborate bas-reliefs of Jesus as the Good Shepherd caring for his flocks; the clock’s hand, the coat of arms and the reliefs all echo the importance of textile and wool trade to the city. One clock face alone has at least 15 sheep (zoom in on the picture of the clock and see if you can spot them all!). Next to the clock is a Gothic belfry tower built in the 14th and 15th centuries which houses the bells connected to the clock, which ring on the quarter-hour.

Rouen is a survivor: It has outlasted Viking raids that travelled up the Seine River, the Hundred Years’ War, the Religion Wars of the Renaissance period, the Franco-Prussian War of 1870, the French Revolution, and even World War 2; the latter damaged nearly half the city, and shrapnel and bullet scars can still be seen in façades. The cathedral’s stained-glass windows were shattered by a WW2 bomb and were subsequently reconstructed using the fragments, creating jumbled images that reflect its history and its survival.

For me, the clock must really be seen within its context to truly appreciate it; it’s surrounded by wonky Medieval buildings which are three or four stories tall and built when plumb lines and uniformity were still futuristic concepts. They were built out of timber, as there is abundant forest nearby but no stone quarries.

The clock adorns the arch over the Rue du Gros-Horloge (“Street of the Great Clock”), which runs between the Gothic cathedral, made famous by Claude Monet (who painted over 30 canvases centred on the cathedral), and the old market square, where Joan of Arc was burned at the stake. Perhaps ironically in light of the latter event, the street just off of the clock’s archway is called Rue Massacre…

Though I do not speak French, I know that in French, clocks today are referred to in the feminine form, la horloge; but prior to the 18th century, clocks were masculine; so, the great clock of Rouen, in French, is still Le Gros-Horloge.

Below are a few of our holiday photos: They include the cathedral’s jumbled windows and the clock from various angles, as well as a few of the wonky buildings. Enjoy!

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Filed under History, History Undusted, Military History, Science & Technology, Snapshots in History

Humanity Highlight: Redeeming Toxic Land with Lavender

I came across this story today, and wanted to share it: In the US, coal mining used to be big business; but with the move away from fossil fuels toward solar and other less destructive sources, companies have been in decline; before the mid-1970s, mining companies could just abandon the scarred land, but laws were passed that would require the companies to revitalise the wasteland; but if a company simply went bankrupt, the land sat barren, polluting the surrounding environment for decades, as rocks and minerals that had been buried forever were exposed to air and water, releasing their substances into groundwater and the air. Millions of acres of scarred land are the result.

Now, Appalachian Botanical Company in West Virginia has begun reclaiming the land in a beautiful way: Hiring ex-miners who’ve lost their jobs or other people who need a second chance just like the land, such as ex-drug addicts, they are now working in fields of flowers. Lavender is a hardy plant in the mint family that likes to grow in poor soil; it’s a perfect match for the rocky wastelands around coal mines. Every part of the plant is used: The flowers and upper stems are distilled down to make lavender essential oils that are then also used to make various creams and lotions, honey, salts, and hand sanitisers; when it’s done, they transform the biomass into compost to revitalise the land. The lower leaves are first removed, dipped in rooting powder, and planted to make the next harvest.

It’s an amazingly holistic approach to the problems: Creating jobs in the regions that have been hard-hit by economic downturns; revitalising the land through restoration – lavender will help prepare the land for other less hardy species to take root; and on a larger scale, it provides an example of what could be done with scarred land. To watch the Business Insider video, just click here. To check out the ABCo website and their products, click on the image below. Enjoy, and if you’d like to support what they’re doing, check out the pages on their websites, too.

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Humanity Highlight: Fighting Deforestation with Coconuts

I love coming across stories about individuals making a difference in the world; it shows that one person can really make a difference – not just the rich and famous, but the unknown and unsung heroes that have a vision, and do what they can with what they have until they have more to see their vision unfold.

Alhaji Siraj Bah is such a person: a young Sierra Leonean, he lost his adoptive family to a mudslide when he was 17. The mudslides are an increasing problem, as 70% of the Sierra Leonean forests have been chopped down for firewood; most families use small wood-burning cookers. But something else that everyone does is eat coconuts. Every day, tons of coconut husks are emptied in the street markets, and the sellers then have to pay to remove their biowaste. Alhaji worked on and found a solution to both problems: Turning the biowaste into biofuel briquettes – coconut coal which gives off less smoke and burns four times more efficiently than wood-based products. This idea is not original – there are many similar products on the market; but what I like about his story is that he refused to give up, looking for a solution to local problems, providing jobs, a free removal service, and offering a locally-grown waste-turned-fuel.

To see an interesting video from Business Insider on his story, just click here.

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