By all accounts, food and agriculture were barely on the agenda at this month’s UN Climate Summit in Glasgow, Scotland. They should have been. Food production, distribution, consumption, and waste contribute an estimated one-third of greenhouse gas emissions. In production, the majority comes from unsustainable livestock production with another large share coming from unsustainable production and use of synthetic fertilizers. But a significant share also comes from “land use change”, a neutral term for the destructive expansion of agriculture onto new land.
That sort of “extensification” of agriculture can have serious environmental consequences – deforestation, soil erosion, unsustainable water use, etc. Those in turn have important implications for climate change, as a recent UN report highlighted. Land use changes due to agricultural expansion increase carbon emissions from land clearing, eliminate carbon dioxide-absorbing plants such as rainforests, and create greenhouse gases with incoming modern farming methods. According to the UN, they account for about 30 per cent of agriculture-related emissions.