Quote Originally Posted by Thorne View Post
I doubt that anyone outside of the media (and politicians, of course) are claiming that humanity is the sole cause of global warming. But the evidence does show that we are a significant contributor.
Except that the Earth's own feedback loops are significantly stronger than human borne effects. As an oddity, global warming theorists will say that humans can significantly impact the global climate, while at exactly the same time explaining that Siberia's methane traps releasing could be 50-100 times (or more) worse than any man-made climate warming.

It's absurdly illogical that we're both a major cause, and completely insignificant.

Completely switching gears to address what lucy's saying: The spinning core of the earth creates a magnetic field around our astral body, the magnetosphere, which is influenced by outside radiation forces. Its role in global climatology is deflection of solar wind so that the atmosphere isn't blown away by the sun (compare directly to Mars, which has a non-molten, non-spinning core, no magnetosphere, and negligible atmosphere). It's this deflection of the solar wind (and in turn plasma sheeting of the atmosphere) that's responsible for things like the northern lights.

It's also responsible for upper atmospheric ionization, storm generation, and a number of other atmospheric effects.