I believe in general in Global Warming, however I've always been very uncomfortable with the dire tone of the weather predictions and the certainty in which they are stated. Here's how I would say it:
1. Fact: We are producing increasingly more CO2 since the 1800s
2. Fact: In a closed unchanging system this would create global warming.
3. Fact: We know of no mechanism that would remove that much C02 from the atmosphere, however, we are a bit uncertain about how much exactly will be extracted by natural processes.
4. Left unchecked and without counter measures, all manner of bad things could happen (famine, flooding of low level areas), however one would expect that countermeasures for these will be taken, such as dutch style sea walls around all low lying coastal cities in the world.
5. Some of our computer models predict awful scenarios such as storms, however our computer models are highly imprecise even under unchanging conditions, and all the more so in a world with changing temperatures. They are our best guess of what would happen, but the degree of uncertainty is pretty high.
6. There is no such thing as point of no return. This is not a nuclear chain reaction that cannot be stopped.
7. It is difficult to predict what will be the impact of some lands turning into deserts while others become feasible land for agriculture.
8. It is equally difficult to predict how wildlife will adapt to this. Will they migrate? become extinct?
9. Surprisingly and contrary to what we would expect we do not see a linear direct correlation between CO2 and the earth's temperature. Modeling this correlation remains one of the big open questions of science today (a similar thing happened with fluorocarbons where initially the chemical processes involved were not very well understood. the persons who resolved this conundrum eventually won the nobel prize of chemistry).