Obama’s plan would reduce emissions by 80% below 1990 levels by 2050, while McCain aims to ensure that emissions are 60% lower by then. Both would achieve these ambitious cuts by the same method: a cap-and-trade system that imposes limits on industry emissions and forces businesses to buy rights to any additional emissions.
两人都要引进减少温室气体排放的激进的目标。奥巴马计划到2050年，使其排放水平比1990年的排放水平相比减少80%，同时麦凯恩的目标是保证到2050年减少60%。两人都打算用同样的方法来取得这些雄心勃勃的减排目标，这个方法就是对工业排放施加限制并且强迫企业购买额外排放权利的总量管制与排放交易体系。