I’m sure you’ve already heard about this, but the great James Randi has posted his stance on climate change, and surprised a lot of skeptics by coming out on the side of the denialists. He admits throughout his post that he’s not an expert on the topic, and I can relate. I’m no expert either. I’ve never studied climatology, and my opinion on the topic is based on the consensus of experts. This might seem like a cop-out, but the truth is that none of us has the ability to know everything about everything. We choose which side to take on issues like this based on a variety of factors, not the least of which should be the opinion of the majority of actual experts. PZ Myers has a great commentary on the reasoning behind Randi’s statements, so I won’t belabor that point, but I recommend you read it.
To that end, I believe that global warming is a real phenomenon, and one that poses a significant threat. And I work in an industry largely populated by people with a vested interest in promoting the denialist perspective. I’ve heard their arguments, and I’ve found them to be generally self-serving and full of spin.
There is truth to the argument that we don’t have the full picture. Weather is a complicated thing, and we don’t fully understand the way it fluctuates. However, it seems to me that we want to err on the side of caution. And I think this video sums it up nicely.