You've probably heard these called " cap and trade" .

你可能听说过这叫做" 限额与交易" 。

One oft-discussed market-based policy is emissions trading or " cap and trade" .

一个经常讨论的基于市场的政策是排放交易或" 限额和贸易" 。

A cap and trade program to reduce acid rain pollution, it worked! It cut sulfur dioxide emissions.

一项减少酸雨污染的限额和贸易计划奏效了！它减少了二氧化硫的排放。

Cap and trade can't solve every environmental problem.

总量控制与交易无法解决所有环境问题。

Many of these used cap and trade.

其中许多使用了上限和交易。

This system, known as " cap and trade, " offered power plants the economic flexibility to keep costs low while strictly limiting pollution.

这个被称为“上限与交易”的系统为发电厂提供了经济上的灵活性，可以在严格限制污染的同时保持低成本。