The approach is based on what can clearly be accomplished, rather than relying on indirect strategies for cutting emissions or boosting energy efficiency, including trading systems for emissions credits. (dotearth.blogs.nytimes.com)
The market value would be based upon the price of emission credits from trading system provided for in the bill. (heatisonline.org)
The scheme would allow the airlines to start a trading mechanism and possibly allow it to trade emissions credits with other industries. (treehugger.com)