Why is Google trying to get into the hitchhiking business?
Altamonte Springs, Florida, struggled for years to develop a transit system.
So what if the rest of the world had high-speed trains before Madonna started making hit records?
Solar is getting cheaper -- but not because of technology.
Installing wind devices could cut container ship fuel use by more than 10 percent, according to one expert.
Only 57 percent had ever set foot in the parks, but 85 percent want more of them -- especially in cities.
A set of canals, levees, and reservoirs that could have staunched Louisiana's floods had been deemed impractical.
Harley-Davidson has agreed to pay $12 million in fines to the Environmental Protection Agency for evading clean air laws.
The EPA's new regulations are a big deal -- both for the troposphere and for the lungs of anyone in trucking territory.