Images of the Starlink constellation in orbit have rattled astronomers around the world.
The E.P.A. plans to change the way air pollution health risks are calculated in a way that would sharply lower estimated deaths from new, looser rules for coal plants.
Microplastics are known to cause ocean pollution, but a new study suggests airborne plastic particles pollute the air and dry land as well.
Steel and zinc industries provided Donora residents with work, but also robbed them of their health, and for some, their lives
Source: The Deadly Donora Smog of 1948 Spurred Environmental Protection—But Have We Forgotten the Lesson? | History | Smithsonian