New Delhi under "severe pollution" smog India gate and other Delhi monuments are hidden by the smog as air in the Indian capital, a noxious cocktail of industrial and vehicle emissions and agricultural smoke from the surrounding regions, is rated as severe. Especially hazardous levels of particulates smaller than 2.5 microns, so tiny they can enter the bloodstream, were 19 times the World Health Organisation's safe maximum, data from the US embassy website showed.