Global Warming: Fact or Fiction?

I agree with Mr.Voight that this topic is becoming too much of a political battle, and should wholly be based on science. But now my opinion on the topic. I do think that greenhouse gases are entering the atmosphere, and that could be a prime factor of global warming. But I think that it is more likely a natural occurrence, though there are many natural occurrences it could be. There have been times when the Earth has gone through dramatic climate changes like the ice age (cooling of the Earth) and the "warm spell" between ice ages (warming of the earth), that are kind of like what we are going through. It could also be the changes in the earth's orbits like the shape of the orbit and the tilt of the earth, that cause the Earth to get different amounts of sunlight at different times (to find out more click here). A change in the sun's intensity could also affect the sunlight received by the Earth, which can cause warming or heating. Just because I don't think that global warming is necessarily caused by humans (although we most likely contribute to it), I think we need to take precautions and try to fix what we are doing that could be harming the Earth.