Is man causing global warming?

Enjoy reading everyones comments here. I believe in Climate Change. It has never been static in the history of this planet. The only constant is change when you look at things over any long term. By the way, I am a Forester that recieved extensive education in meteorology and how mans activities can affect the environment.
That said, the best advice I can give anyone is to seek as much information as possible from as many sources as possible and never rely on info from anyone with an agenda unless it can be independantly verified from different sources.
Long term supply of oil is a serious problem. We need to utilize the resources we have now and develop new technology to tap what we have (oil sands and shale) more efficiently. At the same time we need to expand nuclear power and, most importantly, expand research and development of new power sources for the future.
I know that man does alter his environment, but to what extent on a global scale? Many people bring up the Arctic Ice shrinking, but ignore the unprecedented growth of Ice in the Antarctic. The Antarctic has always contained a great deal more ice than the Arctic. Please research this yourself. You will be amazed at how much more ice has always been at the South Pole.
Foresters make extensive use of statistical analysis. This has taught me that anyone can make selective use of facts to prove what they want.
It has taught me to be a very skeptical and practical person except when I throw all this away and Gamble and just have fun!!!!!