Indian schoolchildren plant trees in Delhi Indian school children plant saplings as they take part in a tree planting campaign. The capital's municipal government organised the initiative to plant thousands of tree saplings across the city on September 8 in an effort to "fight air pollution," according to Indian media. New Delhi is one of the world's most polluted cities where air quality regularly eclipses the World Health Organization's safe levels, prompting the city's chief minister Arvind Kejriwal in November 2017 to claim the city "has become a gas chamber". IMAGES