PBS高端访谈:EPA削减不同程度的乙醇量来测量环境状况
JUDY WOODRUFF: Next: the changing requirements for ethanol in gasoline and bigger questions over its wider use in recent years. Today, the Obama administration proposed cutting the amount of ethanol that would be blended into gasolinenext year. The E
PBS高端访谈:世界大国恢复伊朗核会谈
JUDY WOODRUFF: As pressure builds from critics of a nuclear deal with Iran, negotiators are back in Genevafor another round of talks.Our chief foreign affairs correspondent, Margaret Warner, is also there. I spoketo her a short time ago. Margaret, he
PBS高端访谈:转基因作物引发争议
MEGAN THOMPSON: The Hawaiian island of Kauai is known as the garden isle, luring hundreds of thousands of tourists to its lush northern shores. But fewer make it down to the drier southwest side, home to many native Hawaiians, whove lived here for ge
PBS高端访谈:治水紧急措施
HARI SREENIVASAN: We're joined now by the mayor of Charleston, W.Va., Danny Jones. Thanks for joining us. What is the latest that you're hearing now about the efforts to contain this spill? DANNY JONES,Mayor of Charleston, W.Va.: Well, we know basica
PBS高端访谈:加州太阳能项目对栖息地的影响
JUDY WOODRUFF:Now the challenges of combating climate change. This week, the European Union announced it was loosening its strict environmental regulations in the face of economic setbacks. In the U.S., renewable sources of energy like wind and solar
PBS高端访谈:美国环保局局长为白宫节能减排的计划摇旗呐喊
GWEN IFILL: From the night he was reelected, President Obama has made clear that cutting greenhouse gas emissions was a centerpiece of his second-term agenda. Today, his administration unveiled its biggest effort yet to tackle the issue of climate ch
PBS高端访谈:在矿产州,民主党寻求减排计划的可能性
GWEN IFILL: The president's proposal to cut carbon emissions may not take full effect for several years, but the politics kicked in immediately. In states where nearly all of the electricity is generated by coal, like West Virginia and Kentucky, Demo
PBS高端访谈:敦促商界注意气候的变化
JUDY WOODRUFF: Finally tonight: new estimates on the cost of climate change and the attention it's drawing about the potential economic effect in the U.S. For years, reports on climate change have largely been the province of scientists. But a new gr
PBS高端访谈:墨西哥城正面临日益严峻的用水危机
PBS高端访谈:墨西哥城正面临日益严峻的用水危机GWEN IFILL: Violent protests continued in Mexico today. Demonstrators clashed with police in Acapulco, as anger mounted over the disappearance of 43 students. Late last week, three men d
PBS高端访谈:科学家根据阿拉斯加冰雪层的状况监测气候变化
GWEN IFILL: Finally tonight: how climate change may be affecting life in Alaska as we know it and the captivating images we see there, from ice to Marine life. NewsHour science correspondent Miles O'Brien went there to see for himself. MILES O'BRIEN:
PBS高端访谈:帝王蝶可能会成为濒临灭绝的物种
HARI SREENIVASAN: Every year, millions of North American monarch butterflies head south for the winter in one of the insect world's most fantastic feats. But as you've likely heard, their numbers have declined dramatically in the past two decades. No
PBS高端访谈:濒临灭绝的虎鲸将会被放归自然?
HARI SREENIVASAN: You may have seen the documentary Blackfish that examined the treatment of killer whales at SeaWorld Orlando. Now at the Miami Seaquarium, another controversy is brewing over a whale named Lolita. The National Oceanic and Atmospheri
PBS高端访谈:饮用水管道是如何同时进行发电的?
JUDY WOODRUFF: Next: the possibilities of getting more energy through water. Humans have long harnessed the power of water to perform work. In modern time, hydroelectricity, generated by the power of water flowing through turbines at the base of dams
PBS高端访谈:揭秘矮行星--谷神星的秘密
JUDY WOODRUFF: Let's look at a space mission that's generating lots of interest and excitement. It's the mission to orbit the dwarf planet Ceres by the NASA spacecraft named Dawn. It arrived in March, and as the spacecraft has gotten closer in recent
PBS高端访谈:为什么美国要向加拿大和澳大利亚寻求消防帮助?
WILLIAM BRANGHAM: For more on how fire officials are coping with these many fires, we turn to Ron Dunton. He's with the Bureau of Land Management. And he is helping coordinate fire response at the National Interagency Fire Center in Boise, Idaho. Ron
