Climate crisis debate

Is the man-made global warming true? 

After Al Gore's amazing talk for man-made climate change induced by excessive emission of the greenhouse gases, the topic becomes popular among the public too.

However, the climate change issue entails a lot of professional scientific understandings. Based on the scientific research, there are still a group of scientists who disagree with the anthropogenic climate change. This side of scientists agree with the global warming per se. They just disagree and suggest a wide range of scientific evidence that global warming can be caused by natural factors such as sun activity and ocean cycle.  As a college student, I wondered which sides are saying truth and want to decide my actions to keep human being from catastrophic consequences. 

To be honest, it was tough topic as drilling down. Despite all of uncertainty, I may say that human has contributed a large part of anomalies of global warming.