Per the IPCC's Third Assessment, Circa 2001

"In climate research and modeling, we should recognize that we are dealing with a coupled non-linear chaotic system, and therefore that LONG-TERM PREDICTION OF FUTURE CLIMATE STATES IS NOT POSSIBLE (emphasis, mine)."...…………………………………………………………..This is quite instructive in that it shows just how far that this whole process has descended from one of hard-science to one of political idiocy where we actually have mildly challenged Congresswomen proclaiming that we only have 12 years to act and an hysterical young Swedish girl having a nervous-breakdown for the entire planet to witness. It's sad. It really is.