Manufacturing a car requires metals like steel, copper and aluminium. It also requires plastics, rubber, water and chemicals. Obtaining the iron ore requires mining, smelting and cooling. Petroleum which fuels the car requires oil wells and refineries. Driving the car requires roads.
Roads require land.
Every time it is driven, the car emits a range of harmful pollutants. And when the car reaches the end of its useful life, it has to be disposed of, creating even more environmental problems. But this is not all. Individual use of cars multiplies the thousands of times over more efficient mass systems of transportation. We are already living in a time of environmentally driven change.