Indeed, we could and should do all of these things. None of these things will occur speedily. None of these things will immediately remedy the harmful respiratory problems spawn by the conduct of past generations. We do, however, have in our hands the power to do something for this generation and the next. Trees will not only beautify blighted urban areas but they cleanse and purify the air.
Trees clean and purify existing air as well as manufacture oxygen.
Each person requires 30 to 60 pounds of clean air to breathe each day. As trees breathe, they remove unwanted carbon dioxide from the air a greenhouse gas that contributes to global warming and replace it with life sustaining oxygen. Moisture that trees release traps airborne particles and acts as a filter for some pollutants. Hairy leaves and stems also trap airborne particles and hold them until they are washed to the ground by rain. By modifying the intensity of sunlight and by wind and humidity controls, trees have a significant impact on the temperature around a building.