Sustainable food system in the context of "Sustainable agriculture"

A smallholding or smallholder is a small farm operating under a small-scale agriculture model. Definitions vary widely for what constitutes a smallholder or small-scale farm, including factors such as size, food production technique or technology, involvement of family in labor and economic impact. There are an estimated 500 million smallholder farms in developing countries of the world alone, supporting almost two billion people. Smallholdings are usually farms supporting a single family with a mixture of cash crops and subsistence farming. As a country becomes more affluent, smallholdings may not be self-sufficient. Still, they may be valued for providing supplemental sustenance, recreation, and general rural lifestyle appreciation (often as hobby farms). As the sustainable food and local food movements grow in affluent countries, some of these smallholdings are gaining increased economic viability in the developed world as well.

Small-scale agriculture is often in tension with industrial agriculture, which finds efficiencies by increasing outputs, monoculture, consolidating land under big agricultural operations, and economies of scale. Certain labor-intensive cash crops, such as cocoa production in Ghana or Côte d'Ivoire, rely heavily on smallholders; globally, as of 2008, 90% of cocoa is grown by smallholders. These farmers rely on cocoa for up to 60 to 90 per cent of their income. Similar trends in supply chains exist in other crops like coffee, palm oil, and bananas. In other markets, small scale agriculture can increase food system investment in small holders improving food security. Today, some companies attempt to include smallholdings into their value chain, providing seeds, feed, or fertilizers to improve production.

Sustainable diets are "dietary patterns that promote all dimensions of individuals' health and wellbeing; have low environmental pressure and impact; are accessible, affordable, safe and equitable; and are culturally acceptable". These diets are nutritious, eco-friendly, economically sustainable, and accessible to people of various socioeconomic backgrounds. Sustainable diets attempt to address nutrient deficiencies (e.g., undernourishment) and excesses (e.g., obesity), while accounting for ecological phenomena such as climate change, loss of biodiversity and land degradation. These diets are comparable to the climatarian diet, with the added domains of economic sustainability and accessibility.

In order to create a sustainable diet, emphasis is placed on reducing the environmental cost incurred by food systems, including everything from production practices and distribution to the mitigation of food waste. At an individual level, most sustainable diets promote reduced consumption of meat and dairy products due to the particularly adverse environmental impact of these industries. Data on the intersection between food and sustainability has been prioritized by a variety of international bodies such as the United Nations Food and Agriculture Organization (FAO) and the World Health Organization (WHO).