I’m not seeing acid rain in the list Brian H, though, who knows, they could’ve snuck it in there somewhere. True the earth has experienced wide excursions of temperature and greenhouse gasses in the distant past. But we’re interested in the effects of rapid change happening now, when modern human civilization has developed huge cities along the coasts. A rapid rise of ocean levels could be devastating. If it can be at least diminished we should be responsible and try to limit the sources of warming that are contributing to the accelerated rate of change. Not to mention the other damaging effects of fossil fuel burning as highlighted by Vansig’s posts. I would add acid rain to the list along with mass extinctions…..A new, safer energy source can limit the damages by minimizing the CO2 and CH4 output.
