Why dont republicans belieave in global warming? Some people disagree that the cause of the world being warmer is pollutants. But then you have people disagreeing that the world is getting warmer at all. But there is evidence to prove that the world is getting warmer over the last 100,75,50, and even 5 years. That shouldnt be in dispute. though you still have people not belieaving it. So what is the cuase? is it just cancer syndrome. Where people who have cancer, still dont belieave that smoking caused it. It took over 40 years, and mother of lawsuits to make republicans admit the truth. But over that time, thousands died. and now republicans are enacting laws to prevent lawsuits.