India has some of the most unhealthy air in the world, but the wake up call came in 2014, when its capital New Delhi was ranked by the World Health Organisation as the most polluted city in the world.
Over the next two years,...
India has some of the most unhealthy air in the world, but the wake up call came in 2014, when its capital New Delhi was ranked by the World Health Organisation as the most polluted city in the world.
Over the next two years,...