Climate Change" Mudels" Driving Politcs, page-7

Lomu,
As the science of climate change is "settled " just tell us ( for some light not heat on the discussion ) what amount of the mild 1.3 degC since 1900 is caused by CO2 increase and secondly what temperature rise globally will occur when CO2 levels double from the 300ppm in 1900?
Easy questions for climate change muddlers (modellers) like yourself.