Harold Wanless(Sean Brocklehurst/CBC)Harold (Hal) Wanless had never voted Republican until he voted for Trump in 2016. He was an unlikely convert, a 75-year-old geologist from the University of Miami who ranks as a leading expert on the effects of climate change. Trump had in the past dismissed climate change as a "hoax" perpetrated by the Chinese. As president, Trump pulled the U.S. out of the Paris climate change agreement. As Wanless works on his latest book on climate change, he said he's watching Trump closely.

Source: CBC News January 21, 2018 09:56 UTC