Sure there is a greenhouse effect of CO2 but there is a logarithmic relationship between CO2 level and associated temperature and the biggest impact is at very low concentrations. The problem with their models is not the radiative forcing aspect of CO2 it is with their ridiculous feedback amplifications which have been proven to be false by satellite measurements and their timing estimate of the associated temperature from radiative forcing of CO2. The oceans have a vast storage of heat capacity. It takes centuries for the radiative forcing of CO2 to have any effect on temperature. Radiative forcing of CO2 is not responsible for the myth of global warming.The Carbon Dioxide Greenhouse Effect
Real physicists discussing physics, not silly political statements.
What we are seeing today are natural variations that have always existed.The geologic record and the oxygen isotope curves prove that CO2 acts as a reinforcing agent to temperature change not as a driver for climate change. The world we live in today is classified as an icehouse world. It is characterized by bipolar glaciation and glacial-interglacial cycles. It is geologically rare and possibly unique. For most of earth's history we have been a greenhouse world. The transition to an icehouse world began about 5 million years ago and was driven by plate tectonics/land mass distribution and atmospheric CO2 of 400 ppm. Conditions which still exist today. We are in an interglacial cycle. Our present temperature is at least 1.4C to 2.4C below the peak temperature of three of the four last interglacials. We are well within the normal range of an interglacial cycle.
Our CO2 emissions could go to zero overnight and the rest of the world would replace it in 5 years. There isn't a problem and if it were, we are not the problem.