Wow, this topic turned into a big fight.
But yeah, Global Warming is no bull.
And also, the weather patterns we see now have happened before, at least where I am. My dad said the way the weather is where I live is just like it was in the 70s, lots of hot days in the summer with hundreds of forest fires, along with cold winters with lots of snow.
The Earth definitely is heating up, though, whether global warming or not. 20 years ago a neighbouring city of mine would frequently see about 15 feet of snow buildup in the winters. People would have to dig tunnels to the front door of their house and typically many of the roads were unusable. Now.. they see maybe 1ft of buildup if they're lucky.