H2Andy:In 2001 a panel representing virtually all the world's governments and climate scientists announced that they had reached a consensus: the world was warming at a rate without precedent during at least the last ten millennia, and that warming was caused by the buildup of greenhouse gases from human activity. The consensus itself was at least a century in the making.
http://www.hup.harvard.edu/catalog/WEADIS.html
Ten millennia?
How many millenia have we been burning fossil fuels?