climate change

Science, Tech & Environment

A Rockefeller uses his oil legacy to help save the oceans

Nearly 140 years ago, John D. Rockefeller Sr. co-founded Standard Oil, which revolutionized the petroleum industry and helped build one of the largest family fortunes in US history. He also helped revolutionize philanthropy, creating, among other funds, the Rockefeller Foundation. Now his great-grandson, David Rockefeller Jr., chairs the foundation and is using its influence and money to help save our seas.

Science, Tech & Environment

Storm expert says climate change may have played a big role in Typhoon Haiyan after all

Atmospheric scientist and tropical storm expert Kerry Emanuel has taken a deeper look at the possible influence of climate change on supertyphoon Haiyan, and has found that global warming may have had a good deal more to do with the storm's intensity than he originally thought.

Conflict & Justice

Rethinking biofuels in Europe

Biofuels have been touted as the best hope for reducing reliance on fossil fuels and limiting greenhouse gases. Now many scientists are raising doubts about that. Reporter Kathleen Schalch examines the debate over the costs and benefits of biofuels.

Global Politics

Arctic warming

Arctic temperatures in the 1990s reached their warmest level in at least 2,000 years A new study being published in Science Magazine concludes that cooling was reversed because of increased emissions of green house gases. The World's Katy Clark reports.