Some people think that lawns are bad news for the environment. They think about pesticides, herbicides, fungicides, and other chemicals you use for your lawns. They have this mental image of these chemicals seeping through the soil and into groundwater. Some people do not like the tremendous amount of water you put into lawns. But apart from looking good, a healthy lawn is also environmentally friendly. For one, grasses can clean the air. It can trap carbon dioxide while also reducing erosion whenever it rains. Your lawn can also improve the soil where it's on and help reduce temperatures.