> Ok let's make energy more expensive. I think it's only fair that the pain is distributed equitably, so let's put a $0.1/Gb tax on bandwidth [1], the cloud being one of the largest growing emitters of CO2.

Even if I grant that, I suspect if you're working from home and not business traveling, it's still a net negative of CO2 being emitted. I would think that nearly everything that the "cloud" replaces cost more in CO2 than the "cloud" itself.

But I realize that your point is that it's easy to come up with arbitrary taxes that hurt the poor, and that's a reasonable criticism, but I don't think that that implies that we shouldn't do any kind of externallity tax on carbon. Instead, we could use tax incentives to give a rebate to disproportionately affected poor people for gas, or we could use the extra revenue from the taxes to give rebates for electric cars.

I'm not claiming this is a perfect system, and there will definitely be people who slip through the cracks, and that sucks, but the cost of not doing enough about climate change is substantially worse.