Since 1990, every four years the US government has been required to issue a “scientific” report on climate change and its effects on the economy, environment, and public health. In typical George W. Bush cavalier cowboy style, the 2004 deadline for this report was ignored and the government was sued by green groups. Finally, the long awaited report was four years late, and get this:
…most of the recent global warming is very likely due to human generated increases in greenhouse gas concentrations.