VIDEO | Delhi: CM Rekha Gupta attends inauguration of Metro Museum, talks about Delhi pollution, says, "I often tell those who ask about pollution, how will pollution decrease in Delhi? I say that a large part of pollution comes from transportation. When Delhi, which appears as a small dot on the map of India, actually spreads over 1,483тАУ1,500 kilometres, and nearly 3 crore people live here, with millions of vehicles on the roads, many of them even without pollution certificates, the smoke and emissions from these vehicles pollute the air and make it hard for Delhi to breathe... It is our responsibility that if we want Delhi to remain breathable, we must use public transportation."