Which two sentences from the article contain CENTRAL ideas of the article? An overwhelming majority of scientists believe humans are causing climate change, also called global warming. Heat waves, downpours and wildfires have become more frequent. For the first time, scientists highlighted a dozen "tipping points" of potential dangers that could happen from warming. The world's oceans are under a "triple threat": the water is getting warmer, more acidic and seeing a drop in oxygen levels, Hayhoe said.