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.
Elu, loodus, teadus ja tehnoloogia
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.