Don't take it personally but your arrogance is breath taking....
CO2 is a major driving force for heat changes in atmosphere, look up what happens to CO2 when hit by sunlight, it absorbs energy and releases heat.. SIMPLE FACT.
Are you say sitting there behind your PC saying you know more then the people that have landed robots on the surface of mars and measured it's atmosphere and even looked at the affect of CO2 there??
Care to discredit NASA on this one??? http://earthobservatory.nasa.gov/Features/CarbonCycle/page5.php
"It is significant that so much carbon dioxide stays in the atmosphere because CO2 is the most important gas for controlling Earth’s temperature. Carbon dioxide, methane, and halocarbons are greenhouse gases that absorb a wide range of energy—including infrared energy (heat) emitted by the Earth—and then re-emit it. The re-emitted energy travels out in all directions, but some returns to Earth, where it heats the surface. Without greenhouse gases, Earth would be a frozen -18 degrees Celsius (0 degrees Fahrenheit). With too many greenhouse gases, Earth would be like Venus, where the greenhouse atmosphere keeps temperatures around 400 degrees Celsius (750 Fahrenheit).