Green energy
To become carbon neutral, people can make a switch to solar or wind energy. This reduces the amount of carbon produced by elecricity plants from burning fossil fuels. The community can also make more use of electric vehicles and synthetic fuels.
Vegetation
The community can plant more trees and make use of unoccupied space for greenery. People can also start their own flower gardens and even grow their own food, thus decreasing the use of grocery delivery so less fuel is burned.