And for the record, if you don't think the possibility of killing off half the human population counts as "the most extreme consequences", mind sharing what those might be?
I think Al Gore is much, much better at that than me
, but I do consider killing half the human population among the most serious consequences. See it like this: .nl is for more than half of it's surface below see level. If the sea rises 0.5m, we'll build higher dikes and need to reserve more space for the rivers. Plan was approved several years ago, we are doubling the amount of water our rivers can handle without causing problems. If you claim you build the best dikes in the world, you'd better do so.
If the sea rises 1m, we have a serious problem, because the rivers can no longer release their water in the sea . But we're a rich country, we'll find a solution, if necessary we'll build monstrously high walls around the rivers. If it's 2m, then it's over and out, it's unlikely we have the economy that can build the monstrous installations that are needed to solve that.
Now, in "The inconvenient truth", Al Gore wanted to believe the world that The Netherlands was going to disappear below the sea. I consider that extremely unlikely, and this is what I mean with "not being convinced of the most extreme consequences". That said, more than 2m sea level rise is not considered impossible in the current climate scenarios. It's definately a risk that should be factored in.
Therefore, global warming is a more serious risk to our existance, than mercury is.
Now about the danger of mercury. If a mercury thermometer breaks on the floor, everyone near it is immedeately in health danger. A fluorescent lamp contains very little mercury. If it breaks you will inhalate more than the air quality norms allow, you wil inhalate the amount of mercury that you are allowed to inhalate for two weeks. As long as you are not exposed to it daily, there is little concern.
We've been using fluorescent lamps for decades, and we have not been poisoned by them yet. What is new is compact fluorescent ligths that can replace light bulbs. Perhaps the amount of mercury we produce for lightning will double.
Let me stress I fully agree the mercury issue is a real case against CFL's that needs to be solved, I am not so ignorant as some people here that deny actual problems. But let's not use the mercury problem as an excuse to do nothing about the global warming problem.