Joe Biden witnessed the devastation of drought up close as the first sitting American president to visit the Amazon rainforest Sunday, declaring that nobody can reverse "the clean energy revolution that's underway in America" even as the incoming Trump administration is poised to scale back efforts to combat climate change.

Biden’s emphasis on climate change during his trip creates yet another contrast with Trump as the president prepares to leave office.

The president toured the rainforest and promised Brazil funds for environmental initiatives, even as the incoming Trump administration appears poised to roll them back.