Shut up or put up: Come back when you have implemented your own model that reproduces the 21st century's climate to date without human CO2. This is the standar

Shut up or put up: Come back when you have implemented your own model that reproduces the 21st century's climate to date without human CO2. This is the standard that scientists are judging themselves by. For bonus points predict 2003 based on 1800-2002.