Week of 1/4/2009

Dear EarthTalk: With all the talk of rising seas, what could happen to the rivers that flow into the oceans? Will they reverse flow? Will rising seas back up into fresh water lakes? And what happens to our groundwater should saltwater flow backwards into it?

Dear EarthTalk: Is it better to drive an older, well-maintained car that gets about 25 miles per gallon, or to buy a new car that gets about 35 miles per gallon?