It isn't really clear what Sajak means by "racist." But perhaps he's channeling a strain of conservative argument best epitomized by the book "Eco-Imperialism: Green Power, Black Death," by Paul Driessen. According to Amazon.com, it argues that the environmental movement "imposes the views of mostly wealthy, comfortable Americans and Europeans on mostly poor, desperate Africans, Asians and Latin Americans."
Of course, the reality of the situation is that those who will be most impacted by the extremes of climate change are the world's poorest and most vulnerable.
You might need to buy a vowel here. Science, though, is totally free.