National Wildlife Refuge Threatened

The managers of the sprawling 28,000-acre Blackwater National Wildlife Refuge on Maryland's Eastern Shore recently achieved what they consider an environmental victory by trapping rat-like South American nutria. But new fronts are now emerging in the battle to protect an ecosystem: more than 6,000 homes planned on farmland that drains into the waters feeding the wildlife sanctuary and rising sea levels caused by global warming.

Thanks to Kui Zhao