I'll get you started with some important points and questions.
-Climate change is natural, major trends in glaciation are driven by periodic variations in earths orbital eccentricity, axial tilt and precession (see Milankovich cycles).
-Natural feedback mechanisms play an important role in regulating the temperature, some are negative (eg more warming, more evaporation of oceans, more cloud coverage, less solar insulation, less warming; higher CO2, more productive vegetation, more rapid sequestration of CO2, less atmospheric CO2), others are positive and can amplify change (cooling, more snow coverage, snow reflects sunlight, less solar insulation, more cooling).
-The idea that CO2 causes global warming is predicated on the strong positive correlation between atmospheric CO2 and oxygen isotope data, which is a proxy for ice sheet size (see Rayleigh Fractionation, Vostock ice core, foraminifera isotope data, etc ). Question: If CO2 drives the climate change, what geologic process drives the CO2 change and causes it to occur with the same periodicity as Milankovich cycles?
Question: What is the "natural" temperature for the Earth? What is "acceptable" natural fluctuation?
What is the "ideal" climate? There's winners and losers at either extreme: At the warm extreme, northern Canada and Siberia would be lovely for human inhabitation (see the climate during the Azolla event for example). During glacial maximums, there would be no living plants or animals in Canada because it would be under several km thick ice sheet, whereas Indonesia's island nation would be transformed into a subcontinent (see Sundaland). There's winners and losers, in either case.
If anthropogenic global warming is such a settled science, why have all the models proven to be wrong? Why have none of the dire predictions come true? Why is such well funded, supposedly self evident and irrefutable science riddled with academic fraud (see Climate gate, NOAA data manipulation)