Ants – with their wise farming practices and efficient navigation techniques – could inspire solutions for some human problems

Photo by Kumar Kranti Prasad

By Scott Solomon, The Conversation

King Solomon may have gained some of his famed wisdom from an unlikely source – ants.

According to a Jewish legend, Solomon conversed with a clever ant queen that confronted his pride, making quite an impression on the Israelite king. In the biblical book of Proverbs (6:6-8), Solomon shares this advice with his son: “Look to the ant, thou sluggard, consider her ways and be wise. Which having no guide, overseer, or ruler, provideth her meat in the summer, and gathereth her food in the harvest.”

While I can’t claim any familial connection to King Solomon, despite sharing his name, I’ve long admired the wisdom of ants and have spent over 20 years studying their ecology, evolution and behaviors. While the notion that ants may offer lessons for humans has certainly been around for a while, there may be new wisdom to gain from what scientists have learned about their biology.

Ants have evolved highly complex social organizations.

Lessons from ant agriculture

As a researcher, I’m especially intrigued by fungus-growing ants, a group of 248 species that cultivate fungi as their main source of food. They include 79 species of leafcutter ants, which grow their fungal gardens with freshly cut leaves they carry into their enormous underground nests. I’ve excavated hundreds of leafcutter ant nests from Texas to Argentina as part of the scientific effort to understand how these ants coevolved with their fungal crops.

Much like human farmers, each species of fungus-growing ant is very particular about the type of crops they cultivate. Most varieties descend from a type of fungus that the ancestors of fungus-growing ants began growing some 55 million to 65 million years ago. Some of these fungi became domesticated and are now unable to survive on their own without their insect farmers, much like some human crops such as maize.

Ants started farming tens of millions of years before humans.

Ant farmers face many of the same challenges human farmers do, including the threat of pests. A parasite called Escovopsis can devastate ant gardens, causing the ants to starve. Likewise in human agriculture, pest outbreaks have contributed to disasters like the Irish Potato Famine, the 1970 corn blight and the current threat to bananas.

Since the 1950s, human agriculture has become industrialized and relies on monoculture, or growing large amounts of the same variety of crop in a single place. Yet monoculture makes crops more vulnerable to pests because it is easier to destroy an entire field of genetically identical plants than a more diverse one.

Industrial agriculture has looked to chemical pesticides as a partial solution, turning agricultural pest management into a billion-dollar industry. The trouble with this approach is that pests can evolve new ways to get around pesticides faster than researchers can develop more effective chemicals. It’s an arms race – and the pests have the upper hand.

Ants also grow their crops in monoculture and at a similar scale – after all, a leafcutter ant nest can be home to 5 million ants, all of which feed on the fungi in their underground gardens. They, too, use a pesticide to control Escovopsis and other pests.

Yet, their approach to pesticide use differs from humans’ in one important way. Ant pesticides are produced by bacteria they allow to grow in their nests, and in some cases even on their bodies. Keeping bacteria as a living culture allows the microbes to adapt in real time to evolutionary changes in the pests. In the arms race between pests and farmers, farming ants have discovered that live bacteria can serve as pharmaceutical factories that can keep up with ever-changing pests.

Whereas recent developments in agricultural pest management have focused on genetically engineering crop plants to produce their own pesticides, the lesson from 55 million years of ant agriculture is to leverage living microorganisms to make useful products. Researchers are currently experimenting with applying live bacteria to crop plants to determine if they are effective at producing pesticides that can evolve in real time along with pests.

Improving transportation

Ants can also offer practical lessons in the realm of transportation.

Ants are notoriously good at quickly locating food, whether it’s a dead insect on a forest floor or some crumbs in your kitchen. They do this by leaving a trail of pheromones – chemicals with a distinctive smell ants use to guide their nest mates to food. The shortest route to a destination will accumulate the most pheromone because more ants will have traveled back and forth along it in a given amount of time.

In the 1990s, computer scientists developed a class of algorithms modeled after ant behavior that are very effective at finding the shortest path between two or more locations. Like with real ants, the shortest route to a destination will accumulate the most virtual pheromone because more virtual ants will have traveled along it in a given amount of time. Engineers have used this simple but effective approach to design telecommunication networks and map delivery routes.

Photo by Carlos Pernalete Tua

Not only are ants good at finding the shortest route from their nests to a source of food, thousands of ants are capable of traveling along these routes without causing traffic jams. I recently began collaborating with physicist Oscar Andrey Herrera-Sancho to study how leafcutter ants maintain such a steady flow along their foraging paths without the slowdowns typical of crowded human sidewalks and highways.

We are using cameras to track how each individual ant responds to artificial obstacles placed on their foraging trails. Our hope is that by getting a better understanding of the rules ants use to respond to both obstacles and the movement of other ants, we can develop algorithms that can eventually help program self-driving cars that never get stuck in traffic.

Look to the ant

To be fair, there are plenty of ways ants are far from perfect role models. After all, some ant species are known for indiscriminate killing, and others for enslaving babies.

But the fact is that ants remind us of ourselves – or the way we might like to imagine ourselves – in many ways. They live in complex societies with division of labor. They cooperate to raise their young. And they accomplish remarkable engineering feats – like building structures with air funnels that can house millions – all without blueprints or a leader. Did I mention their societies are run entirely by females?

There is still a lot to learn about ants. For example, researchers still don’t fully understand how an ant larva develops into either a queen – a female with wings that can live for 20 years and lay millions of eggs – or a worker – a wingless, often sterile female that lives for less than a year and performs all the other jobs in the colony. What’s more, scientists are constantly discovering new species – 167 new ant species were described in 2021 alone, bringing the total to more than 15,980.

By considering ants and their many fascinating ways, there’s plenty of wisdom to be gained.

Opinion: Now Is the Perfect Moment to Decarbonize Global Trade

Photo by Andy Li on Unsplash
Photo by Andy Li on Unsplash

September 10, 2020 by Paul Hockenos

International freight transport — whether by air, land, or sea — still relies overwhelmingly on fossil fuels, accounting for 30 percent of transportation-related carbon dioxide emissions and more than 7 percent of all global emissions. Experts agree that freight, and international trade more broadly, must be decarbonized if we expect to hit the Paris Agreement’s climate goals. With the world’s freight carriers deeply shaken and supply chains upturned by the Covid-19 pandemic, now is exactly the right time to begin reshaping it.

Until recently, global trade has been largely ignored in the discourse about the transition to a low-carbon economy. One reason is that it is a cross-border business, and thus largely falls outside of the emissions reduction plans of individual nations. As a result, it has escaped much of the scrutiny that other industries have faced over their carbon footprints.

In the midst of the coronavirus crisis, with so many planes grounded, ports restricted, and borders sealed, the world has a rare opportunity to make sweeping changes in the freight sector. It should jump on the chance.

Many of the world’s largest freight transporters are flailing during the pandemic and will be reliant on government money to survive. Major European airlines are cutting massive bailout deals with their governments right now. (Over one fifth of aviation’s carbon footprint stems from freight transport.) Cargo shipping and road freight are also at crossroads. As a result, governments have leverage to prod these industries to go greener and contribute their fair share to hitting international climate targets.

This might, at first, sound like a Sisyphean task. Global trade is the source of millions of jobs and diverse, inexpensive goods for consumers around the world. But there is growing recognition of freight’s centrality in the climate crisis, and there have already been tentative moves to decarbonize it — by requiring sustainable biofuel blending and better energy efficiency, as well as by shifting emissions-heavy road freight to railroads and ships. For example, in 2018 the International Maritime Organization, the U.N. agency responsible for establishing environmental standards for the shipping industry, for the first time pledged to reduce greenhouse gas emissions from international shipping to half of 2008 levels by 2050. The EU’s $1.7 billion Connecting Europe Facility will, among many other projects, bolster the continent’s rail networks and facilitate the adoption of greener fuels for all modes of transportation in the E.U., including freight carriers.

There are several ways the trade sector can continue building on this foundation.

First, governments should attach environmental conditions to any pandemic-related bailouts and loans. “The case for reconsidering the current incentive structure of transport-related policies has never been stronger,” says Olaf Merk of the International Transport Forum at the Organization for Economic Cooperation and Development.

Austria and France are already doing this with their national airlines. In Austria, government-secured loans and grants totaling more than $500 million to Austrian Airlines come with stipulations that the airline limit short-haul flights and cut its carbon emissions to 50 percent of 2018 levels by 2030. Likewise, the French government has insisted that Air France, which will collect $8.3 billion in government aid and loans, slash emissions from domestic flights by 50 percent by 2024 and buy more fuel-efficient planes. In stark contrast, Germany required nothing of the sort from Lufthansa — which owns Austrian Airlines — in exchange for its $9.9 billion rescue package.

Strings should also be attached to rescue money and loans to cargo shippers, should more require them. International shipping carries close to 80 percent of global trade and accounts for 2.5 percent of global greenhouse gas emissions. French shipping company CMA CGM has already had to take a $1.1 billion loan, backed largely by the French government but with no conditions attached. Any future loans or bailouts should hinge on the condition that shipping companies reduce the carbon intensity of their transport by at least 40 percent by 2030 compared to 2018— a hard-nosed target that goes beyond the shipping sector’s current, non-binding pledge to reduce emissions to 50 percent of 2008 levels over the same time span. Though ambitious, the target is feasible: Ever more alternative fuels and electric and hybrid engine designs are emerging to replace the dirty maritime fuels used by most heavy-duty shippers.

“Shipping, most of which is freight, has largely escaped serious decarbonization measures until now,” says Carlos Calvo Ambel of the Brussels-based watchdog group Transport & Environment. “It has to set tough, binding targets.”

A second step that governments can take is to cut back global trade in favor of more regional production. Here, too, there is movement in Europe. French President Emmanuel Macron and German Chancellor Angela Merkel recently underscored the importance of diversifying supply chains to reduce dependence on foreign production and reinforce Europe’s “economic and industrial resilience and sovereignty.” As Björn Finke, E.U. correspondent for the German daily Süddeutsche Zeitung, wrote in May, the realization that so much of Europe’s medical supplies and technology come from China has prompted politicians to rethink the continent’s trade policy: “less globalization, less division of labor between countries, more at home.”

Another policy measure that could impact imports is a recently proposed E.U. carbon border adjustment levy, which beginning by 2023 would apply a charge on goods imported into the E.U. based on the emissions emitted during their production. The tax could force trade partners to enforce emissions reduction measures not just on traded goods but on freight carriers too.

Of course, another means to decarbonize global trade would be to impose a hefty carbon tax on all international freight, as well as on aviation fuels, which currently go completely untaxed in the E.U. The E.U. is planning to apply carbon pricing to the shipping industry and reduce free carbon emission allowances currently allotted to airlines under Europe’s current policy.

These measures, though, must be implemented in a way that produces real change. Experts anticipate that trade by freight will triple by 2050, which would seriously undermine the goals of the Paris Agreement at present emissions levels. With talk of “Green Deals” in the air in Europe and the U.S., now is the time to set the freight sector on the road to comprehensive decarbonization.


Paul Hockenos is a Berlin-based journalist and author of several books on European politics.

This article was originally published on Undark. Read the original article.

Environmental Impact of e-Scooters, Q&A With EarthTalk

What’s the environmental impact of these dockless e-scooters I see all over town now?
—Jim M. Salisbury, CT

By now, you’ve certainly seen dockless e-scooters in your town or somewhere nearby. Some 85,000 of these electric-powered, phone-unlockable mini-vehicles crowd the streets and sidewalks of 100 different metro areas across the U.S. In 2018 they surpassed dockless e-bikes as the most common app-rentable transport option nationwide, with riders taking them on some 38.5 million trips.

A recent lifecycle analysis found that bicycling, walking and buses are all “greener” modes of transport than dockless e-scooters…but are they as fun? Credit: Brett Sayles, Pexels.
A recent lifecycle analysis found that bicycling, walking and buses are all “greener” modes of transport than dockless e-scooters…but are they as fun? Credit: Brett Sayles, Pexels.

These e-scooters are often marketed as “green” or “carbon-neutral” because they run off electric batteries instead of fossil fuels, but consumers shouldn’t think they’re getting a completely guilt-free ride. A recent lifecycle analysis from North Carolina State University assessing the “cradle-to-grave” environmental impact of e-scooters found that bicycling, walking and buses are all “greener” ways to get around.

A rider hopping on an e-scooter doesn’t necessarily think about the carbon emissions and other impacts involved with manufacturing, transporting and maintaining these otherwise low-impact electric vehicles. “If you only think about the segment of the life cycle you can see, which would be standing on the e-scooter where there’s no tailpipe, it’s easy to make that assumption,” says Jeremiah Johnson, an NC State professor and study co-author. “But if you take a step back, you can see all the other things that are a bit hidden in the process.”

While relatively light and small, e-scooters must carry a battery in addition to their basic frame and electronic systems. Producing these batteries takes a heavy toll on the environment, although no worse than similar types of batteries used in e-bikes and even electric cars. Besides the batteries, the aluminum used to create the e-scooters’ frames and the rubber for their tires add to their environmental footprint.

The NC State researchers found that about half of an e-scooter’s carbon footprint is created during production, while most of the rest (43 percent) comes from collecting and recharging them every night. In general, e-scooters are charged by freelance workers known as “juicers.” At the end of each day, they take e-scooters off the street and typically charge them up at home via their own power outlets (likely not from renewable sources). Furthermore, the majority of juicers pick up e-scooters in gas-powered cars or trucks. The upshot is that the common charging process is a long way from being carbon neutral.

That said, e-scooters are currently about twice as efficient as the average car in per passenger miles per gallon (in this case CO2 units emitted per passenger carried a distance of one mile). However, a car carrying more than one passenger can reach the same or even better levels of efficiency as an e-scooter. Buses, when fully loaded, easily beat e-scooters in per passenger efficiency, while bicycles easily beat buses.

Of course, e-scooters are sure to become more efficient in the future as both the production and pick-up processes get greener. As a consumer, you can improve the situation by using e-scooters to replace car trips, but bikes or buses are still a better choice as far as the planet is concerned.

CONTACT: “Are E-Scooters Polluters? The Environmental Impacts of Shared Dockless Electric Scooters”.

EarthTalk® is produced by Roddy Scheer & Doug Moss for the 501(c)3 nonprofit EarthTalk. Send questions to: question@earthtalk.org.