全球变暖是我们目前面临的一个大问题，不过全世界都过分关注二氧化碳，却忽略了另外一个重要的气体——甲烷。 Fred Krupp: Let's launch a satellite to track a threatening greenhouse gas 我们能否发射一颗卫星来追踪威胁地球的温室气体？ We've got a big problem on our hands with global
I will live and lead by these principles: to advance my convictions with civility, to pursue the public interest with courage, to speak for greater justice and compassion, to call for responsibility a
美国俄克拉何马城——曾是全美肥胖症最普遍的城镇之一。市长米克·科内特分享市民全民瘦身累计100万磅的经历。 Mick Cornett: How an obese town lost a million pounds 一个“肥胖”的城镇如何“瘦身”100万磅 How many of you have been to Oklahoma City? 在座的
