You asked if the changes promoted by the "Greens" would really constitute a lessening of lifestyle. I submit the answer is a clear yes and people know it for a fact. Otherwise, global government treaties would not be required. Were the impacts of those changes negligible, then people would make those changes on their own, without the threat of government force.
What say you to that?
>>>Won't people just reduce their carbon production voluntarily?>>>
That is an absurd statement. If people did things that they new were good or bad or right or wrong voluntarily we would not need government. Expecting indivudals to have the capacity to "volunteer" to change their actions to solve a macroeconomic issue has no precedent, because it cannot happen.
Perhaps you are an anarchist at heart.