Climate scientists say the Paris Agreement on greenhouse emissions may offer the last, best chance to slow global warming. Some 200 countries are gathered in Morocco to nail down the accords -- led by the US and China. But, during his campaign, America's President-elect called global warming a hoax — invented by China. His transition team features a climate-change denier. If Trump pulls out, do the Paris Accords have a future? What about his promises to end the Obama Clean-Power Plan, dismantle the EPA and bring back coal?