India's capital announced a slew of measures Sunday to combat the
crippling air pollution that has engulfed the city, including closing
down schools, halting construction and ordering that all roads be doused
with water to settle dust.
New Delhi, one of the world's dirtiest cities, saw levels of PM2.5 — tiny particulate matter that can clog lungs — soar to over 900 micrograms per cubic meter on Saturday. That's more than 90 times the level considered safe by the WorldHealth Organization and 15 times the Indian government's norms. The severe weekend pollution followed a week of constant gray smog.