French lawmakers passed legislation to increase the target price of carbon to 56 euros ($61.48) a ton in 2020 and 100 euros a ton in 2030, The rate, now 14.50 euros a ton, climbs to 22 euros a ton in 2016 and is integrated in a levy on fossil fuels.
This is an example of how a country can integrate fossil-fuel taxes with cap-and-trade (the EU ETS) to hit a price target. (full story)