Science is never settled.  CO2 and temperature have correlated poorly over earth's history.  For example, temperature rose from 1900 - 1940 while CO2 levels were flat, then fell until 1977 when they rose sharply.  The swings of direction correlate quite well with the AMO/PDO cycle, again oceans governing the climate.  To overlook the sun and the oceans and focus on our .meaningless 0016% of the atmosphere is no way to settle anything. 

Moreover, GHGs are already absorbing almost all of the IR of which they are capable and we are not even close to the Medieval Warm Period, which was a wonderful time for humanity.