the.com/smog
sky soup brewed by cities that forgot air was supposed to be invisible.
name origincoined in 1905 by blending smoke and fog
deadly weekLondon's 1952 smog killed roughly 12,000 people
chemistrysunlight cooks exhaust into ground-level ozone
visible from spacesatellites map smog blooms over megacities
color cuethat brown haze is nitrogen dioxide showing off