In the 1900s, the U.S. warmed everywhere except the Southeast, where warming didn't begin till the 1990s. A study finds air quality improvements may have played a role.
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In the 1900s, the U.S. warmed everywhere except the Southeast, where warming didn't begin till the 1990s. A study finds air quality improvements may have played a role.
Trumpler 3 and NGC 2353 (Labeled). X-ray: NASA/CXC/Penn State Univ/K. Getman; Optical/IR: PanSTARRS; Image Processing: NASA/CXC/SAO/N....
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