Ceteris paribus, doubling of atmospheric CO2 causes warming of about 1 degree Celsius. That's not called "quadratic" where I come from. (Runaway warming, when

Ceteris paribus, doubling of atmospheric CO2 causes warming of about 1 degree Celsius. That's not called "quadratic" where I come from. (Runaway warming, when it's hypothesized, is hypothesized to be the product of novel higher-order interactions.)