Due to rapid growth in population, more and more people come to the cities in search of employment. This growing population needs housing, jobs and other infrastructure. As cities expand to accommodate this ever-increasing population and development takes place, all concern for ecology is forgotten. Rules and regulations regarding the protection of the environment are flouted everywhere. As a result, trees are cut at a large scale to make way for flyovers and metro trains, green cover land is converted into colonies for people. Diesel driven trucks and buses pollute the atmosphere. As more and more people fall sick with breathing and heart problems, the government takes note and wakes up to address the situation.
The use of CNG vehicles in Delhi and ban on all vehicles more than sixteen years old are some of the ways adopted by the administration to curb the evil of pollution. This year farmers have been warned not to burn the stubble in their fields after harvesting their paddy crop. This used to pollute the air in Delhi and other cities. These are some of the ways to control pollution.