Earth does not rotate on a static axis, it is rather dynamic although fairly consistent angle. Point being, the Little Ice Age is theorized to have occured as a result of a shift in the Earth's axis, just enough to result in a colder mean temperature. The Solar system we inhabit is very complex and the interaction between Earth and the other planets, and the Sun in particular, must have an effect incomprehensible at this point. However, we are told that climate change is absolutely the result of the rise of CO2 in the atmosphere, and the natural forces that make up our Solar system are benign. There are bigger forces at work in relation to climate change than a gas that is fairly insignificant atmosphere-wise.