Sustainable Diets

Food, alongside water, sunlight, and fresh air, is a fundamental necessity for human existence. As our society progresses, we encounter ever more intricate challenges in generating an adequate food supply to fulfill the escalating demand.

Globalization in our food systems has historically presented solutions, but it has also led to uniform diets, weakened local economies, unreliable supply chains, and negative impacts on the environment.

Practices within the food industry have exacerbated issues such as pollution, soil erosion, and ecosystem imbalances. The pressing question remains: how can we enhance food production sustainably for our expanding population while mitigating environmental damage?

Broadly speaking, around 2 billion people worldwide consume diets of poor quality, with over 800 million suffering from malnutrition. Paradoxically, even in nations grappling with hunger and undernourishment, there is a rising concern regarding overnutrition and obesity. This raises another question: how can we reconcile this with the vast amounts of food wasted every year?

Ultimately, we must contemplate how to enhance food security and public health while safeguarding the planet’s health for future generations. Although we may have more questions than solutions at this juncture, the concept of “sustainable nutrition” can guide our coordinated efforts.

Sustainable Nutrition

Sustainability offers a forward-thinking outlook that considers society’s current needs while ensuring our survival and that of our environment in the long run. A reliable food supply must be sustainable.

The tenets of sustainable nutrition are varied. Diets rich in sustainably sourced foods can minimize environmental damage, protect biodiversity, boost food security, provide essential nutrition, and promote healthy living for both current and future generations.

Such diets should also be accessible, affordable, culturally appropriate, and economically fair for producers and consumers alike. Plant-based diets are often highlighted for their environmentally friendly attributes.

With numerous sustainable nutrition principles, individuals can craft their personalized food plans tailored to their health needs, financial situations, and values.

Essential Human Nutrition

For survival, our diet must include carbohydrates, proteins, fats, vitamins, minerals, and water. Additionally, dietary fiber, antioxidants, and phytochemicals support overall well-being and are linked to a reduced risk of chronic illnesses.

From a sustainable nutrition angle, emphasizing the production and consumption of nutrient-dense foods can help minimize food waste and enhance human health. Nutrient density refers to the nutrient content per calorie in a food item. Among the most nutrient-dense foods are seaweed, leafy greens, wild salmon, egg yolks, grass-fed beef, nuts, seeds, and legumes.

Sustainability in the Food Industry

Food loss refers to the edible resources wasted before they reach consumers. Globally, food loss from processing alone amounts to 200 million tonnes each year.

The food industry can tackle these losses by transitioning toward a closed-loop supply chain that optimizes waste management. A waste stream encompasses the journey of waste from its creation to its disposal.

Employing a closed-loop supply chain enables the recycling or repurposing of surplus food, byproducts, and waste. Businesses can donate excess food to food banks and recycle food waste for animal feed, compost, fertilizer, or bioenergy.

For example, regenerative agriculture aims to restore and enhance ecosystems while producing food. Research on regenerative sheep farms has shown that such practices can significantly reduce their environmental impact through the repurposing of collected biomass.

Compared to conventional farming, regenerative techniques focused on soil health can also improve the nutritional quality of both plant and animal products.

Grow Food at Home

Urban farming promotes self-sufficiency and enables the establishment of an organic, sustainable food supply at home. No matter the size of your outdoor space, here’s how to start your own food garden easily and economically.

“As a first-time gardener, keep it simple,” suggests Jacquie Conte, an organic master gardener and owner of Grow at Home Niagara, who provides resources and guidance for urban gardening.

“Begin with a quick assessment of sunlight exposure and the type of growing space you have—whether it’s in-ground, raised beds, or containers,” says Conte. “Choose a few plants that you want to eat and cultivate in your garden.”

Starting with herbs provides an excellent, low-cost, low-waste gardening experience. “Perennial herbs like peppermint, oregano, and thyme require minimal maintenance, and you can harvest only what you need,” Conte explains.

Greens are also a sustainable option as they can regenerate and have an extended growing season. “Sturdy greens such as lettuce, spinach, and kale are ‘cut and come again’ plants,” Conte says. “These can endure cooler temperatures and can be planted and harvested throughout the growing season, possibly extending into winter.”