Cut down on waste
About one-third of food produced globally is lost or wasted, contributing up to 10% of carbon emissions, according to the UN. When it ends up in landfills and rots, it produces the potent greenhouse gas methane. Households are responsible for a large portion of this waste. So you can curb your footprint in 2021 by planning meals, buying only what you need, and by freezing and reusing leftovers.