The facility, in Colstrip, Mont., used a new E.P.A. system for requesting special waivers from President Trump.

Clara Brugada and Mexico's private sector signed an agreement Tuesday to improve the capital's poor air quality through six ...

Delhi Chief Minister Rekha Gupta on Wednesday, while addressing the assembly during discussions on the CAG reports on ...

The rate at which the planet is warming has sped up since 2010, and now researchers say that China's efforts to clean up air ...