President Donald Trump tore into environmental "prophets of doom" at the Davos forum Tuesday, rejecting fiery warnings from teenage campaigner Greta Thunberg, and lauding the "unprecedented" US economy just hours ahead of his impeachment trial back home.

Activist Greta Thunberg said on Tuesday planting trees was not enough to address climate change, in an apparent rebuke to a pledge in Davos by US President Donald Trump an hour earlier.

Donald Trump Repeats Offer To "Help" On Kashmir Ahead Of Talks With Pakistan PM Imran Khan