When peatlands disappear, stored carbon dioxide gets released into the atmosphere.
Lawmakers craft a bill that will move the US to a far cleaner energy policy.
In Canada, concerns mount about weapons smuggling – a problem that has long roiled Mexico.
Laura Ling and Euna Lee, nabbed along the Chinese-North Korean border, have become players in a much larger drama.
Two recordings from the Al Qaeda chief and his deputy may signal that Obama's overtures, particularly his speech in Cairo Thursday, have put the organization on the defensive.
Many Israelis see the president's decision to bypass Jerusalem as part of a broader shift in US priorities in the region.