"Global warming" is just the catchphrase applied to the cyclic climatic changes in the Earth - I think the cycle runs about every 5,000 years or so, with major swings every few cycles (like the Ice Age.)
I think we're currently on a warming trend anyhow (I'd have to check my data,) and we're probably due for a "swing" - since the last was the last Ice Age some 30,000 years ago. So, a "hot swing" is probably likely and due.
Do we, with our industry and actions, enhance the cycle? Possibly. Did we cause the cycle? Certainly not! Our era of industrialisation simply coincided with an uptick in mean global temperatures, leading people to believe (those who don't back away and look at the whole picture...) that we're the cause.
We are not.
This doesn't mean that we can't be doing things to help reduce the swing that we may very well be headed for, but we're still going to see an increase in mean global temperatures, and we'll eventually see the decrease, once we crest the rise and the pendulum swings the other way.
Hoestly, I think people raising all the hue and cry about Global Warming and simply people who take the human race entirely too seriously. Earth has been around for about four billion years, we've been here for the last 200,000 in a form recognisable as hominids, and about 15,000 in our current form. That's about one quarter second in a year, folks - geologically speaking, we haven't been around long enough to cause any serious trouble!
