The international scientific consensus is that climate change is manmade, and a serious threat. There are meaningful steps that can be taken, but they won't happen with Republican climate science deniers in charge of the U.S. House, Senate, or White House. One example, Trump says climate change is a hoax perpetrated by the Chinese:  http://www.politifact.com/truth-o-meter/statements/2016/jun/03/hillary-clinton/yes-donald-trump-did-call-climate-change-chinese-h/