To get the United States off fossil fuels in this uneasy national climate of terrorism and conflict in the Persian Gulf,we must treat the issue with the urgency and persistence it deserves.

• 要想在恐怖主义和波斯湾的冲突这种全国不安定的气氛下让美国放弃矿物燃料，我们必须在对待这个问题上具有应有的紧迫感和坚定性。