Change starts with ourselves. However, we ought not to initiate the change, needing a higher body to oblige us to make a change.
Lot'ree (Lot for Tree) is an idea opted for the government to mandate the people to plant trees before being able to own a lot. Since the titling of lots passes through the government, it is possible that they can adopt this idea by making a law or order which indicates that in every 20 square meter of lot to be owned, one tree should be planted by the pursuing owner on an agreed location.
With the implementation of Lot'ree, trees will be planted. Thus, cooling the Earth.