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Global warming has brought the mountain pine beetle to whitebark pine trees in the Yellowstone ecosystem -- with wide-ranging repercussions for the ecosystem.

The earth's glaciers and icecaps seem to be melting faster in recent years. Climate change is suspected, but the behavior of the earth's cryosphere does not lend itself to simple generalizations.

A Washington state environmental agency has blocked, at least for now, development of another port proposed for exporting coal to China.

"Oil prices hovered above $91 a barrel Monday in Asia as some OPEC ministers signaled the group doesn't plan to boost output to cool the recent jump in crude."

"China said on Tuesday it will cut its export quotas for rare earth minerals by more than 11 percent in the first half of 2011, further shrinking supplies of metals needed to make a range of high-tech products."

"Environmentalists claim the U.S. Environmental Protection Agency has overestimated by more than 20 times the value of recycling coal burning wastes."

"LAKE TEXOMA -- In a cove on this massive lake on the Texas-Oklahoma border, it doesn't take long to find zebra mussels."

"When you were trying to figure out what to buy for the environmentalist on your holiday list, fur probably didn't cross your mind. But some ecologists and fashion enthusiasts are trying to rekindle a market for fur made from nutria -- rodents that are destroying Louisiana's wetlands."

"Japan postponed plans for a national emissions trading scheme on Tuesday, bowing to powerful business groups that warned of job losses as they compete against overseas rivals facing fewer emissions regulations."

"Russian boys exposed to unusually high levels of environmental pollutants are smaller than their peers, a new study reports."