the science is too complicated to understand, unless you are a climatologist, so we need to put our trust in where the scientific consensus is at right now. and the consensus is that ever since 1750 there has been a constant yearly increase of man-made global warming. other questions about GW such as predicting the effects and future ruin of the earth is not known and one can have their own opinion about that part of the issue.
many articles here are authored by dr. steven novella, of the sgu. he is my favorite science educator and skeptic on the planet. he’s the closest thing to a “prophet” for me here on the earth. i recommend listening to his podcast weekly.
articles on climate change:
“And in the end we have to trust scientists that they were able to detect a global warming trend of 1.5 degrees C since 1880, on the backdrop of all the local and short term fluctuations. I do trust the consensus (NASA can send out a probe and hit Saturn, so they have earned some trust) and I have not heard any arguments that I find compelling to distrust it. But I also understand why many in the public find it difficult to trust.” (from article: NASA – Last Decade Warmest on Record)
Dylan Ratigan vs. Glenn Beck good explanation of climate change
other great links showing the consensus amongst climatologists:
Is there a scientific consensus on global warming? (probably the best site with quick-access info)
hope that helps!