While tribal, federal, state, officials expected to attend event are lauding move, Trump threatens to reverse course.

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges southward into the U.S., Europe and Asia. Studies show that a fast-warming Arctic is partly to blame ...

This International Day of Clean Air for blue skies, we call upon everyone—from governments and corporations to civil society and individuals—to Invest in #CleanAirNow. By tackling air ...

The cable car project proposes ropeway services to complement existing road, rail, and metro systems and the preservation of ecological and cultural landmarks such as Elephanta Caves, Matheran ...