1. It has changed people's living conditions and lifestyles and provided great convenience to mankind. 2. The automobile has accelerated the exchanges between different regions and played a great role in promoting the mutual development of different regions. 3. The automobile has produced many new things such as: automobile advertisements, automobile exhibitions, etc., providing people with a lot of employment opportunities. 4. Automobiles have driven the development of related industries and induced the emergence of emerging industries and high-tech. Disadvantages of cars 1. Traffic accidents occur frequently. 2. Exhaust gas pollutes the environment. 3. Oil is tight, and there are more and more vehicles, and the demand for oil is increasing. 4. Traffic jam.