Insect-Based Diets: A Sustainable Solution for Climate Change and Food Security
The convergence of climate change, food insecurity, and declining well-being has created a crisis that demands innovative solutions. Kieran David Robertson, a researcher in insect-derived proteins, proposes a compelling approach: incorporating insects into our diets and agricultural practices. Speaking at TEDxQueensUniversityBelfast, Robertson challenges our perceptions of insects, advocating for their potential as a sustainable food source that benefits environmental, human, and animal health.
The One Health System
Robertson frames the issue within the context of the "One Health" system, a multidisciplinary approach aimed at optimizing the health of humans, animals, and the environment. This perspective highlights the interconnectedness of these domains, emphasizing that solutions must address all three to be truly effective. The current state of affairs, marked by record-high greenhouse gas emissions and unsustainable food production practices, threatens this delicate balance. While advancements of the industrial revolution improved our lives, they have also led to environmental degradation. For example, the average car emits 400 grams of carbon dioxide per mile, and even boiling a kettle contributes to greenhouse gas emissions. Thus, insects emerge as a promising intervention.
From Zookeeper to Insect Advocate
Robertson's journey into the world of entomophagy (the practice of eating insects) began during his time as a zookeeper. Noticing a decline in the quality of animal feed after COVID-19, he began to question his own dietary habits. This introspection led him to recognize the nutritional potential of insects, which he was already feeding to animals in his care. This realization prompted him to pursue research in Belfast, where he now explores the role of insect-derived proteins in livestock diets.
Insects as a Natural Part of the Human Diet
While the idea of eating insects may seem foreign to many in Europe, Robertson points out that it is a common practice in many Asian, African, and South American countries. In fact, around two billion people worldwide consume insects daily, with over 300 edible species in some local areas. Rather than a novel concept, entomophagy is a return to a more natural and sustainable way of life. Insects can be incorporated into our diets in various forms, including whole insects, protein powders, and oils, offering a versatile range of culinary possibilities.
Environmental Benefits
One of the key advantages of insect farming is its minimal environmental impact. Insects require very little space, freeing up land for social housing, schools and healthcare facilities. They are also natural detritivores, meaning they consume decaying organic matter. This allows for the possibility of feeding insects on low-cost surplus supermarket produce, agricultural byproducts, and food waste, promoting a circular economy that enhances sustainability and reduces costs. Furthermore, insect farming produces far fewer greenhouse gases than traditional livestock farming. Robertson's research in Belfast has even shown that insects have the potential to directly reduce methane emissions in cattle, a significant finding with implications for mitigating climate change.
Nutritional Value
Insects are not only environmentally friendly but also highly nutritious. They boast a protein content of around 50%, surpassing that of soybean or chicken. Additionally, they are rich in fiber, a nutrient often deficient in modern diets. A single serving of insects can provide up to 20 times more calcium than a glass of milk, the same amount of vitamin B12 as chicken, and more polyunsaturated fatty acids than wild Atlantic salmon. This makes insects a valuable tool for promoting global food security, particularly in impoverished areas where access to nutritious food is limited.
Animal Health and Welfare
Insects play a natural role in the diets of many wild animals, including pigs, chickens, cats, and dogs. Reintroducing insects into domestic animal diets can offer numerous benefits. Livestock fed on insects exhibit improved growth, welfare, and health, while also reducing agricultural and veterinary costs. Importantly, studies have shown that insect-based diets do not negatively impact the texture, quality, flavor, or nutrient content of meat or eggs, ensuring a seamless transition to sustainable agriculture.
A Call to Action
Robertson urges us to reconsider our perceptions of insects, viewing them not as "gross, dirty, alien-like creatures" but as a sustainable and nutritious food source. He draws a parallel to shrimp and lobster, highlighting that these "insects of the sea" are already considered delicacies. With 2030 fast approaching, the year many climate scientists consider a critical turning point, the time to act is now. Robertson notes that by 2030, an estimated 1 in 40 chickens will be fed insect-based diets, indicating that progress is already underway. He encourages consumers to be open to insect-based products, recognizing that our daily decisions can have a positive impact on the planet. By embracing insects as a nutritional powerhouse, we can pave the way towards a more sustainable and secure future for all.