In a landfill or poorly managed compost heap where there is no fresh air, food and garden waste breaks down to form a mixture of gases, including the very active greenhouse gas, methane. Compost non-meat food scraps.
Most local councils can advise on composting techniques.
Leave grass clippings and leaves to break down naturally in the open air, or compost them. If it smells, there is not enough air and it is producing greenhouse gases. Consider planting deciduous trees along the west or east side of your house. They will create shade to cool your home during summer, yet still allow sunlight to penetrate and warm the house during winter. As factories and trucks use this energy, they generate greenhouse gases.