That is what the experience from the cap-and-trade program for acid rain suggests: costs came in well below initial predictions.
从酸雨灾害下实施的配额交易得出的经验是,实际代价总不愈起初的预计。
3
Some version of the "cap and trade" market-based system that has already shown its value in reducing acid-rain pollution is virtually certain to pass this Congress. "the."