Recently, Delhi was touted as giving competition to Beijing as the city with the most polluted air and heaviest smog. This interactive shows the most polluted places in the world, rated as having either the worst air, water, land or soil due to various reasons—industrial, chemical, traffic, mining, waste processing and other human activities. In this infographic we cite some of the most polluted places we've encountered. But it is important to point out that the problem is really much larger than these sites.
