The greens in the garden

Some houses that are constructed on a big lot have a nice garden that is full of plants and trees. Some houses are erected on a big lot that is concrete all around for purposes of parking for the vehicles. The 2 types of homes are now in stiff competition but it is obvious that the concrete lawn is winning over the garden.

Science tells us the plants and trees give us the oxygen that we need to breath. If there are more greenery then we get more oxygen. In return, we exhale carbon dioxide which the air that is needed by the plants and trees. So it is like exchanging favors with the plants and trees that they give us oxygen and we return the favor with carbon dioxide. But if the concrete garden wins the competition, we would be exchanging carbon dioxide with the vehicles and no more oxygen.