How does/will Global Warming affect the Earth?

It's taking away our natural resources as well as those of plant and other living creatures. It is not caused by our negligence though. This is a natural part of our earth's history in which our out protection layer around the earth (our magnetic sphere) is thinner and less effective at keeping outward threats away from our surface. Because of that layer, things like the suns rays, debris from outer space, and other types of matter are being let in more so than if our protection was at full strength. The problem is, we might not be able to get our magnetic sphere back up to full strength unless to poles switch. The last time that happened, dinosaurs were around. That is what people are worried about happening in 2012. It won't happen, but this is still the fear. People thought that human life would have died out before the poles were going to switch again. This could disrupt every bit of technology that we own, down to a comp. Global Warming, isn't what people think it is. Do a bit more research on the subject to see what is really going on.