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Sustainability: Eating Insects to Save the Earth

The thought of eating insects often provokes disgust in many people. But what if we could get over our squeamishness and start eating insects regularly? Sure, your relatively tame palate might not be accustomed to insects’ taste or crispy texture. But there are good reasons why you should consider making them a part of your diet.

Sustainable Source of Food

Insects are a sustainable source of food that can help save our Earth. They are packed with essential nutrients, are easy to cultivate, and require less land, water, and energy to raise than traditional livestock. Insects can also help reduce greenhouse gas emissions and combat climate change.

The Food and Agriculture Organization of the United Nations has endorsed edible insects as a sustainable way to alleviate world hunger and climate change, encouraging people to “overcome the psychological barrier” of eating them (1).

Cricket InsectEating insects may sound strange to some, but it is quite common. More than 2 billion people around the world regularly consume insects (2). This staggering statistic should not be surprising, considering there are an estimated 10 quintillion (that’s 10,000,000,000,000,000,000) individual insects alive at any given time.

There are around 1,900 species that are edible to humans. So there’s a good chance you’ve already eaten an insect and didn’t even know it. Insects are often used as food colorings, flavorings, and thickeners in various products, including pasta, cereal, bread, crackers, and ice cream.

Let’s explore the potential of insects as a food source and find out why they might be the key to Saving the Earth.

Insects are among the most critical bioresources that can be part of the sustainability solution to feeding the world’s growing population and ensuring nutritional security. Fried, baked, or roasted insects are a crunchy and healthy snack high in protein, fat, vitamins, and minerals (1).


Current Situation Needing Change


1. Fertilizer Shortage (& Prices)

Nowadays, abundant crops depend on fertilizer, a fundamental element in agricultural production.

The world is facing a shortage of phosphate rocks (PR), a key ingredient in fertilizer. Phosphate mines are running low, and the remaining reserves are becoming harder to access. Unfortunately, phosphorous is a nonrenewable resource, so once it’s gone, it’s gone for good.

Several reports warn that current phosphate reserves will be depleted within 50 to 125 years. In fact, from 2040, we will likely start facing a period of deficiency that will restrict agricultural production (3).

This is concerning, as the world’s population is projected to increase from the current 8 billion to 9.7 billion in 2050 (13). This means that we will need to produce more food. With such a population, we could be staring at mass starvation and a potential political crisis between phosphate-rich countries and importing countries.

Some may say that this is quite far-fetched. Zooming in on what is happening today, global fertilizer prices have shot up by over 80% due to the ongoing Russia-Ukraine war (4). This has led to increased food prices amid tough economic times.

With minimal advancement in other food sources, we must find more efficient and innovative ways to increase food production and security. This is where insects come in. Insects have been eaten for centuries by cultures around the world. In many cases, they are considered a delicacy.

Insects are everywhere; they reproduce quickly, have high growth and conversion rates, and do not rely on scarce resources like land, water, and feed. Therefore, they can potentially mitigate the effects of the fertilizer crisis by providing a sustainable and alternative source of protein to humans and animals.

2. Globalization Issues

We are amid a climate crisis, and it is no secret that livestock farming significantly contributes to greenhouse gas emissions. The United Nations, Food and Agriculture Organization estimates that the livestock sector is responsible for 14.5% of global greenhouse gas emissions (5).

This huge figure is due to methane and nitrous oxide produced by cows and other animals, as well as deforestation caused by the expansion of pastureland and animal feed production.

Besides, the livestock sector is also one of the biggest consumers of freshwater (6). Feed production and processing, animal digestion, manure managemCowsent, and enteric fermentation are estimated to use about one-third of the world’s fresh water.

The water demand will only increase as the population grows and the need for meat increases, weighing in on the sustainability and ethicality of the meat industry as a whole.

The current system is not only unsustainable but also unjust. Small-scale farmers and pastoralists are the ones who suffer the most from the negative impact of livestock farming on the environment. They are also the ones who are being pushed out of their land to make way for large-scale commercial operations.

We are also seeing the effects of climate change on our food supply. Droughts, floods, and other extreme weather events are becoming more common and are expected to disrupt food production further.

Besides the weather, human-imposed factors such as wars and trade disputes can also lead to food shortages and price hikes. We have seen this happen in the past year with the Russia-Ukraine conflict.

The current system is not sustainable, and we must find a more efficient way to produce food. Insects could be the solution we are looking for.


3. Land Needed For Current Farming Techniques

Insects require a tiny amount of land to farm and can be vertically stacked so that you can get more output from a smaller land area. For example, when looking at the land required per gram of protein by species, studies show that Cows need 254 square meters, compared to 18 square meters for insects (8).

per gram of protein in livestock vs insect farmingFarmland required per gram of protein in livestock vs. insect farming as of 2018, by species (in square meters) Source:

This is important. We must start producing food more efficiently to feed the world’s growing population without destroying our earth. And there is no more efficient way to produce protein than farming and eating insects.

We are already experiencing a land shortage for farming, as more and more land is being used for urbanization and other purposes. This is putting a strain on our resources and is one of the reasons we need to find a more efficient way of producing food.

Insect farming could be integrated into urban and city locations, reducing the farming Carbon Footprint even further. This golden opportunity should not be overlooked to improve food security and reduce the Carbon Footprint of our food production (12).


4. Potential Famine 2023-2024

The global hunger crisis is moving into a dangerous phase, with World Food Program predicting a new wave of catastrophic famine in 2023-2024 (9). They have warned that the world is not prepared to deal with it.

The report says we are on course for a repeat of the famines of the 1970s when nearly a million people died in Cape Verde, Bangladesh, Chad, and Ethiopia. The main difference this time is that the number of people at risk of starvation is much higher.

The WFP estimates that there could be as many as 250 million people facing hunger by 2023-2024. This is due to a perfect storm of factors, including climate change, economic upheaval, the Ukraine-Russia crisis (10), and population growth.

The WFP has warned that climate change will also play a role in the coming famine. They say that droughts and erratic rains make it harder for farmers to produce food.

According to the WFP, we need to take immediate action to avert this impending famine. And one of the things we can do is to start farming insects. It’s the most efficient way to produce protein and could help save millions of people from starvation.


Benefits Of Insect Farming

Raising and eating insects has several benefits that could help Save the Earth and Humanity.

Here are some of the reasons why insect farming is good for sustainability:


Environmental Benefits


  • Insects Take Up Less Land and Other Resources
    Insects require far less land and resources than traditional livestock like cattle or pigs (8). Insect farming takes up 10-80 times less land than livestock farming, making it a more efficient use of resources. In addition, you can farm insects in vertical systems, producing more food in a smaller space.

  • Insects Produce Fewer Greenhouse Gases
    Insects also produce fewer greenhouse gases than traditional livestock (12). Cattle farming, for example, emits large amounts of methane, a potent greenhouse gas. In contrast, insects like crickets release very little methane.

  • They can help Reduce the Carbon Footprint
    Insect farming can also help offset your carbon footprint. Insects produce fewer greenhouse gases than traditional livestock farming. Breeding insects requires less energy and land than breeding livestock. They can be raised in layers in climate-controlled facilities, offering the possibility of year-round and local farming.

  • Insects Require less Feed
    Insects are also more efficient eaters than traditional livestock. They can convert food into edible protein at a higher rate, requiring less feed overall. Since they are cold-blooded, insects’ feed-to-meal conversion rates (feed needed to produce a 1 kg increase in body weight) are 2-fold to 4-fold higher than vertebrates like chickens, pigs, or cattle. On average, insects can convert 2KG of feed into 1KG of insect mass (11), whereas cattle require up to 8KG of feed to produce 1KG of body weight gain.

  • Insects Can Be Farmed on Organic Waste
    Insects can feed on bio-waste such as dirty water, animal slurry, compost, paper, and cardboard that humans and traditional livestock cannot eat. This means that they can be farmed on dirty water and organic waste that would otherwise end up in landfills. They can also turn brewery waste into an additive for depleted soil and high-protein animal food.

  • Insect Farming is Less Water Intensive
    Insect farming is also less water-intensive than traditional livestock farming. It takes approximately 550-700 litres of water to produce 1KG of beef (14), whereas insects take just 1-4 litres of water to produce the same amount of insect protein.

  • Insects can be Grown Locally
    Insects can be grown locally, even in urban and city locations, which reduces the need for transportation and the associated emissions. Farming environmentally-adaptive species of insects could also help reduce the impact of climate change, as they are more likely to survive in a changing climate than traditional livestock.

  • Insects Produce Less Waste
    Insects produce less waste than traditional livestock. Their waste is also less polluting, as it contains fewer toxins and can be used as a fertilizer. In fact, the United Nations’ Food and Agriculture Organization (FAO) has suggested their excrement, called frass, is an excellent fertilizer and soil amender.

  • Insects Can Be Used to Control Pests
    Some species of insects can be used to control pests, reducing the need for harmful pesticides. For example, the larvae of the common green lacewing can be used to control aphids, mealybugs, and whiteflies.

  • Insects can Help Restore Ecosystems
    Farming insects can help restore ecosystems that have been damaged by traditional livestock farming. For example, insects can be used to break down manure and improve soil health.

  • Insects can Reduce Deforestation
    Thousands of land cover and habitats are destroyed yearly to make way for traditional livestock farming, including grazing grounds and cropland. Insect farming doesn’t require as much land, so it can help reduce deforestation.


Health Benefits


  • Insects are a Nutritious Food Source
    They produce high-quality dry proteins that rival soybean in protein concentration and essential micronutrients like calcium, iron, and zinc. Insects are also a good source of healthy polyunsaturated fats, which are vital to human health but difficult to obtain from other sources.

  • They pose low risks of transmitting zoonotic diseases, as they do not host the same pathogens as traditional livestock. What’s more, their small size and rapid reproductive cycle make it difficult for diseases to spread.

  • Insects can also be a valuable source of nutrition-rich feed for animals
    For example, crickets contain more protein than soybeans, making them an excellent source of livestock feed.


Social Benefits


  • Insect farming is a multi-million dollar industry that employs millions of people around the world.
    It can provide a source of income to smallholder farmers, as it requires little capital investment and can be done on a small scale.

  • Insect processing is fairly simple and does not require expensive machinery.
    This means it can be done by small businesses and generate employment in rural areas.

  • Insects are a profitable solution to food waste
    Globally, food waste is a huge issue that’s attracting cross-sector attention, yet only a few sustainable solutions exist. Insects can turn this food waste into a valuable resource, providing an additional income stream for businesses.


Drawbacks Of Insect Farming


  • Yuck Factor
    A “yuck factor” associated with eating insects may be difficult to overcome. This is particularly true in Western cultures, where eating insects is not widely accepted. But by adapting various culturally acceptable processing methods such as powders, flours, and oils, the “yuck factor” can be minimized.

  • If not well managed
    Insect farming can lead to increased populations of pests. For example, if farmers are not careful, the mealworms they farm for food could escape and become a nuisance. Therefore, it’s important to carefully consider the risks associated with any farming, including insect farming, before getting started.

  • Need to be Properly Prepared
    Some health risks are associated with eating insects, mainly if they are not properly cooked. For example, certain species of caterpillars can cause organ damage if eaten raw. It’s important to be aware of these risks and take steps to minimize them.

  • Quality
    Like with many farming processes, the quality of the output is mainly dependent on the input. If insects are fed a diet of unsafe waste materials, they will likely contain high levels of toxins and heavy metals. This is why it’s essential only to use safe, reputable feed sources for insect farming.

Are Insects Healthy To Eat?

There are over 2 billion people in the world who regularly consume insects as part of their diet, and there’s a reason why (11). Not only are insects a sustainable source of protein, but they’re also packed with essential vitamins and minerals such as calcium, zinc, and iron.

But not all insects are created equal when it comes to their nutritional content. For example, caterpillars contain more protein than crickets, while termites are higher in fat. So if you’re looking to add insects to your diet, it’s essential to do your research and choose ones that will best fit your nutritional needs.

There is a caveat, though. Not all insects are safe for human consumption. In fact, some can even be poisonous. So before you start munching on bugs, ensure you know which ones are edible and which aren’t.

Research shows that insects can offer heart-healthy nutrition due to the high load of iron, zinc, B12, essential amino acids, omega-3 and omega-6 fatty acids, fiber, and antioxidants (12).

A single serving of insects provides as much protein as two eggs, and they require far less land, water, and energy to rear than conventional livestock such as cattle. What’s more, they produce a fraction of the greenhouse gases that livestock does, making them a more sustainable source of protein.


Using Insects In A Circular Food System

A circular food system is restorative and regenerative by design and seeks to keep products, materials, and nutrients within the system for as long as possible. This is opposed to the linear food system, which takes a “take-make-dispose” approach in which resources are extracted, used, and discarded. A vital component of a circular food system is waste reduction.

Insect farming provides efficient waste recycling systems with high environmental and nutritional yields. Insects are fed waste streams from crop and animal farming, providing high-quality protein in return. Not only do they reduce waste, but they can also be used to replace conventional livestock in a regenerative agriculture system.

This new farming frontier promises massive opportunities for growth and scalability and significant environmental and sustainability benefits. For example, using insects in a circular food system could be a game-changer in the fight against climate change, helping us save precious resources while reducing greenhouse gas emissions.


Final Thoughts

With a growing world population, we must move away from conventional farming and find innovative alternative ways to produce both sustainable and nutritious food. Farming and eating insects offer a viable solution to this problem.

Insects are a sustainable and environmentally friendly source of protein. They are efficient converters of feed to food, requiring less land, water, and feed than traditional livestock.

They also have a lower carbon footprint than conventional meat sources. Since insects can be fed a variety of food waste streams, they can play a unique role in a circular food system, helping to reduce waste and close the nutrient loop.

If we are to meet the demands of a growing world population, ensure food security for all, and save our Earth, we must start exploring new ways of producing food. Insects offer an up-and-coming solution to these problems.




Artist (Header):

Artist (Article Images):


1. Food and Agriculture Organization of the United Nations
Insects for food and feed

2. Research Gate
How many people on our planet eat insects: 2 billion?

3. The Future of Strategic Natural Resources
Fighting Peak Phosphorus

4. International Food Policy Research Institute
Short-term policy considerations to respond to Russia-Ukraine crisis disruptions in fertilizer availability and affordability

5. Food and Agriculture Organization of the United Nations
Key facts and findings

6. Food and Agriculture Organization of the United Nations
Water use in livestock production systems and supply chains

7. Worldbank Blogs
Fertilizer prices expected to remain higher for longer

8. Statista
Farmland required per gram of protein in livestock vs. insect farming as of 2018, by species(in square meter)

9. Saving Lives Changing Lives
Unprecedented needs threaten a hunger catastrophe

10. McKinsey & Company
A reflection on global food security challenges amid the war in Ukraine and the early impact of climate change

11. Food and Agriculture Organization of the United Nations
The contribution of insects to food security, livelihoods, and the environment

12. National Library of Medicine
Potential health benefits of edible insects

13. Our World Data
Future Population Growth

14. Meat The Facts
How Much Water Does it Take to Produce 1KG of Beef?

Our Earth