Car exhaust has been blamed for increasing the amount of carbon dioxide in the air . some scientists believe this additional carbon dioxide in the air may cause

Car exhausts emit carbon dioxide by burning of non-renewable sources of energies, i.e., fuels. The increase in carbon dioxide in the atmosphere will increase the greenhouse effect and it is one of the major causes of the global warming problems, being faced by the world today. This increases the temperature of the earth and if it continues, it will be difficult to survive in such warm environment.