Came across this webpage...don't know who to believe

So is global warming really happening? If yes, is it a natural cycle or is it man made? Or is it a natural cycle that’s been amplified by mankind?

I keep seeing statistics that are spun both ways, some to show global warming isn’t real, others to show it is but it’s normal, and others to show a sudden abnormal rise over the last 50 years.

http://www.bloomberg.com/news/features/2015-09-17/scorching-year-continues-with-hottest-summer-on-record

Who’s right and who’s wrong, the never ending debate.