I would consider many other pollutants to be more harmful to marine life.

Carbonic acid is pretty weak, unstable at STP and as I recall binds with inorganic material pretty well to form bicarbonates. I haven't research it but I would surmise that is why there is so much limestone around.

CO2 levels have been way higher in the past. I've been wondering if something like an Azolla Event will happen again if they get to high.

Here is a link on that for everyone.

http://www.absoluteastronomy.com/topics/Azolla_eventL

Before you argue it, I understand as we know it human civilization and population may take a big hit before we get to that point. I haven't ran any numbers yet.

So backtracking to an earlier train of thought, a warm trend seems more prevalent yes but if a cold snap intervenes it would be much worse, though less likely statistically so far.

global warming + nuclear winter = 0

Do you have any useful references or statistics on that Mr. Lysergic acid diethylamide avatar man?

futurama>star wars imo

Bite my shiny metal...... uh light saber.

Seriously, if you have some good info post it plox.

nah im just bored

Yes, excessive volcanic activity causes cooling, but since I was talking about a period where the whole earth was frozen, the only way for such a cycle to break is tectonic activity. Once a part of the land ice has been molten, it will not instantly regrow. And volcanic eruptions the size of Yellowstone and the like spew so much gases into the air, that it could eventually cause a greenhouse effect.

I got my facts out of http://en.wikipedia.org/wiki/A_Short_History_of_Nearly_Everything, which has references itself.

Haha, wow, what a moron.

This post was edited by SafetyFirst on Jun 15 2009 11:15pm

Global warming is happening, not cooling.

Yes, but does that mean we're currently warmer than we're supposed to be? I'm afraid not, since much warmer periods have existed in the history of planet Earth. Much cooler periods aswell. The only question we should ask is if the climate is warming up faster than supposed, and to reference current data we don't have enough from previous times.