If you were to ask ten people on the street if mankind was causing global warming, at least eight out of ten would say yes. After all, Al Gore’s Inconvenient Truth provides incontrovertible evidence that this is the case. Yet, contrary to what is heard in the media, there is overwhelming evidence that the warming we are experiencing is natural, with maybe a small amount contributed by man’s activities. Nor is there any scientific consensus. The debate is still raging within the scientific community.