Answer:there would be an increased level of carbon dioxide
Explanation: carbon dioxide is one of the gases that is produced from the fumes of automobiles. It is released when animals respire. In developed urban areas, there are large population of automobiles and the rate of burning of fossil fuel is high. There is also a high population of people and this further increase the carbon dioxide level, causing pollution. Trees are supposed to take in carbon dioxide for the photosynthesis. But when the amount of vegetation is reduced,carbon dioxide accumulates. This causes air pollution and global warming which is disastrous for the earth.
An increase in the level of carbon dioxide causes the heat in the earth to be trapped ,just like in a green house.this causes the earth to warm up more than usual