Expert says Australia wildfires are a direct ‘impact of human caused climate change’

Wildfires continue to tear through Australia, displacing more than 1 billion animals in one of the world's most unique ecosystems. Michael Mann, a distinguished professor of Atmospheric Science at Penn State University, tells Ali Velshi that unless humans stop "worsening the problem with fossil fuels," these fires will soon become common place around the globe.Jan. 11, 2020