What is Global Warming?

By now everyone has heard of this several times, and everyone has their own opinion about it. This is global warming. When I think of global warming I think of everything getting warmer, less snow since the planet is changing, and I think about all the animals that are in danger from all the glaciers melting. When I asked my dad what he thought about it he said he thinks instead of the planet just getting warmer, that it is the planet having more serious weather patterns. What he was referring to was when is snows that we will have more intense snow storms, or when it is hot that it will stay hotter the usual. Then when you ask some other various adults they think it is fair to blame president bush for this. I don't agree with that because as bad as this has got it is more then one man can do alone. So I found this website and just by looking at the main page of it, it tells you a reasonable explanation for how it happened.