Wolfgang, have you seen the documentary, 'An Inconvenient Truth'? Its analysis and conclusions are as valid for you as they are to the USA. This is not an isolated phenomenon.

Gore talks about the pre-historical fluctuations and concludes that this is something different or at least something very much more immediate and impactful to the human race. If we- as the human race - are major contributors to the event, it should behoove us to reduce our impact as much as possible as soon as possible.