Some experts believe that we're already in a sixth mass extinction event, but given the numbers, others aren't so sure.

US President Donald Trump used his address to world leaders at the United Nations on Tuesday to denounce climate change and green energy, making a series of misleading claims in a rambling speech that ...

WASHINGTON — President Trump argued Tuesday that policies meant to mitigate the effect of climate change are all just a bunch of hot air, calling them “the greatest con job ever perpetrated” in ...

For decades, Los Angeles has topped the list as the smoggiest city in the U.S., but now, climate change is fueling a new kind of pollution from toxic urban wildfires to heat-driven ozone and smoke ...