Carbon dioxide is known to effect the thermal capacity of the atmosphere, humans have been assisting with the introduction of more CO2 into the atmosphere in our history though it has been higher in pre-historic times.
The modeling that was introduced 10 years ago showing that global warming was spiraling ever upwards has proved to be flawed, and scientists can't seem to agree on a model that makes sense and agrees with the current data.
That said, I think it's time to take CO2 production seriously and take steps to reduce our carbon output.
However I fail to see how a 'wealth re-distribution' tax, with the later option of buying trees in Brazil is going to help us develop carbon reducing technologies or jobs.