Oakland, a Northern California city with a population of over 425,000, had the worst air quality in the world Saturday morning.
Wildfire smoke wafting over from the still-growing Camp Fire — by far the deadliest wildfire in state history — had inundated many heavily-populated California cities and towns with small bits of pollution thinner than the width of a human hair, called Particulate Matter 2.5, or PM 2.5.
Berkeley Earth, a scientific climate organization, keeps tabs on air pollution around the globe. As of Nov. 17 at 9:30 a.m. ET, Oakland topped the global list with particle concentrations of 167 μg/m3 (meaning micrograms per cubic meter) — which are levels deemed "Very Unhealthy" by the U.S. Environmental Protection Agency. Coming in a distant second is Kanpur, India with particulate levels of 132. Read more...More about Science, Global Warming, Climate Change, Air Pollution, and California Wildfires