[asokoloski]

This is why I think H.R. 763 (in the US) is a well-designed bill. It taxes everything, and has a built-in tariff to serve as incentive to other countries to implement similar carbon taxes. I hope it passes. I believe it starts out at $15 per ton, then goes up by $10 per ton each year, with adjustments based on whether we're falling short of our greenhouse gas reduction goals, or greatly exceeding them.

[Pxtl]

For reference, Canada's is $20CAD/tonne currently, going up $10/year up to a cap of 50. So the US $15 is about the same to start, but ramping up a bit faster when you figure exchange rate.