Michael Dudley

Billions of North American birds are killed each year by flying into windows, studies suggest.

Environmentalists worry that development pressures -- even for higher-density transit-friendly communities -- are eroding Florida's complex natural environments.

America's foreclosure crisis is taking a heavy toll on communities by diminishing tax bases, lowering school enrollments, and contributing to rising crime.

The latest figures show that one out of every 54 households were in foreclosure in 2008; analysts expect millions more foreclosures in the coming year.

The image of tens of thousands of people being put to work on massive public works projects may be a thing of the past, some economists argue.