We can stop it if all the people in the world will do the right things. it's not a natural precess, it's something that the human made it happen. and the humans can stop it because they actually made the problem.
Actually, global warming and cooling
is a natural process. It tends to follow the cycles of the sun, as the sun has periods of increased and decreased activity, which affect the climate on earth. Thirty years ago, people were saying all the gas emissions were causing a global cooling trend, since the sun's activity was hitting a low point. We're in the higher points of the cycle, currently.
Now, this is
not to say that humans are causing no environmental damage. We almost certainly are. However, we don't have a solid idea of how much damage we are causing, or in what ways we cause it. Furthermore, we have no real idea how to stop it. The simple answer to everything regarding global warming is "We Don't Know". To throw out plans to fix the damage when we don't even understand the damage is silly, and could cause even more problems. It's like trying to fix your house's electrical problems when you're not an electrician--you're just likely to set your house on fire.
There are a few things we should already be working on, this much is true. Moving to renewable energy resources is a big one, if for no other reason than oil and coal will not last forever. There is a finite amount of it. Solar, wind, and hydroelectric energy are all in heavy development. Progress is being made every day, and things are improving in those fields.