The volcanic ash cloud over Europe continued to delay flights across the continent on Friday. The ash cloud is affecting the Afghanistan war. Scientists say that the cloud could continue to last for weeks, or even months. Airports in the United Kingdom will remain closed until at least 1 a.m. on Saturday.
A spreading plume of ash from an erupting Iceland volcano shut all British airports and effected air travel across northern Europe. The precautions reflect protocols developed after volcanic ash almost caused two disastrous crashes in 1982.
Iceland leads the list of the greenest nations. The US fell 22 places in the 2010 Environment Performance Index, but the study's researchers say that "murky" data makes the list imperfect.
Mount Redoubt, an active stratovolcano in the state's Aleutian Range, is twitching and belching like someone who just downed a case of Mountain Dew, signs that geologists say tend to precede an eruption.