I had to choose neither, mainly because my answer is 'dunno'.
There is no proof whether or not man is changing the climate. Possibly, but possibly not. As the climate is never stable there is no way to definately prove it one way or another.
While it remains a possibility it would be wise to be cautious and try and make as little impact on the environment as possible. Or at least, that's what I think.
Ann - I have Lomborg's book on the environment. I had to learn all the different theories surrounding the environment and climate change in my first year at university. I found the most interesting thing about him is that he believed man was adversely affecting the environment until he analysed the statistics himself.
