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Trains were used to transport people and cargo long distances across the country in a short period of time. As soon as automobiles became popular, trains saw a decline in passengers. Because of the automobile, railroad passengers decreased 40% from 1920-1929
Since their creation and rapid growth in popularity in the 20th century, cars have become a huge part of many lives. While they offer the clear advantage of convenience, they come with some negative effects, as well. Cars are a contributor to air pollution and global climate change, as well as a danger
Negative effects of cars. The cars emit the greenhouse gasses such as carbon dioxide which contribute in the global warming, Some air pollutants and particulate matters from the cars can be deposited on the soil and the water surface where they enter the food chain that can affect the reproductive, the respiratory, the immune and the neurological systems of animals.
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