I'm no fan of Trump, but can put aside my distain to see the hypocrisy on the part of both his fans and critics. The point is that nobody criticized Kamma for becoming a science advisor to a president who understood clean coal when first appointed, so there is a level of hypocrisy there. Secondly, there is such a thing as clean coal so those criticizing either or both Presidents need to do some homework. Is clean coal as safe as other methods? No, but the technology exists. Here is some help. 
http://science.howstuffworks.com/environmental/green-science/clean-coal.htm
http://www.popularmechanics.com/technology/infrastructure/news/a27886/how-does-clean-coal-work/