"Buying a solar system for your home still is not as simple or inexpensive as say picking up a new water heater. But solar energy advocates argue that the systems are affordable and obtainable for just about everyone -- right now."

"Most great scientists have prizes named after them. Or university buildings. Not Bob Drewes."

"The federal government plans to spend up to $3 million a year to demolish and rebuild uranium-contaminated structures across the Navajo Nation, where Cold War-era mining of the radioactive substance left a legacy of disease and death."

Abandoned gas stations dot some Florida highways. Economic conditions bear part of the blame. But operators' inability to pay for replacement of old, leaky tanks ironically may be causing more old tanks to be left in the ground.

"Oyster larvae have been dying by the billions. Scientists suspect it's a sign that carbon dioxide is dramatically affecting the ocean -- and if they're right, it could push Washington into the center of the debate about the future of the seas."

"The largest, deepest and coldest Great Lake holds another distinction -- the highest levels of the contaminant toxaphene in the region and possibly anywhere in the world."

A National Research Council report says it may be impossible to know whether contaminated drinking water at the Camp Lejeune Marine base caused birth defects and illness among people seeking $33.9 billion in claims.

If the Army Corps of Engineers and private companies used all the mud they dredge from wetlands and waterway to rebuild Louisiana coastal marshes, it would be a boon for coastal restoration.