[palmer]

Yes, it's certainly the things that we don't know that are most worrying. Just consider two facts: The global climate system is full of positive feedback loops that amplify small initial changes, and we don't fully understand the system yet. That implies that our computer projections are underestimates. And indeed, that's what we're seeing in the real world. Shifts, such as increases in hurricane intensity, are progressing decades ahead of the projections.

Positive feedback loops? No negative ones? Also it sounds like he doesn't know the first thing about the models, or care. Pure fearmongering attached to a few bits of biased science.

[cogitator]

No negative ones?

Most of the feedback loops are positive. Clouds, a major factor, are uncertain. The ultimate effect of clouds is dependent not only on whether cloud cover increases or decreases, but on what kind of cloud cover increases or decreases (i.e., low cumulus or high cirrus, etc.)