First - consider carefully whether emissions of all pollutants are lowered by the same percentage. Normally CO2 emissions are drastically reduced, while other pollution controls may or may not be introduced which lower other emissions.

Before introducing a carbon price, you'll need to decide whether you want to consider this price a true "social cost", or whether the cost is really just transferred to another part of society (i.e. government, or taxpayers, etc). When viewing the result Costs: Social Costs, LEAP displays only certain categories of costs, and you may or may not want your carbon price to be reflected in these costs. If your carbon price truly is a social cost, then you can include it by modifying the Variable O&M cost by an appropriate amount. Otherwise, you may modify the Fuel Cost variable (this appears for each of the process' feedstock fuels) appropriately to include both the fuel price and the CCS subsidy. The Fuel Cost variable does not affect LEAP's Social Cost results, though it is visible by viewing the result Costs: Module Cost Balance.

Hope this helps,

Taylor

you may need to look through the attached file. hope it will be usefull

the following link may be usefull too: http://markets.businessinsider.com/commodities/co2-emissionsrechte