When a 2-miles-per-gallon improvement is better than improving by 16 miles per gallon.
The batteries weren't at fault. Plug-ins are still a good idea.
Why we shouldn't get excited by the latest hydrogen cars.
A missing generation of oil workers will make ramping up supplies tough.
Oil money is being enlisted to build a city that will use no oil and produce no carbon emissions.
Even with oil prices soaring, by some estimates, they're still short of historic highs.
Sometimes carbon credits fund clean industries that would prosper anyway.
Creating and ordering my greeting cards online was easy, but the layers of packaging make me wonder if I've damaged the earth in the process.
There's nothing simpler than avoiding having to wash dishes by just throwing them away. Sometimes it's best to adopt the more complex route for the sake of being green.
The projection that U.S. farmers will grow less corn this year is bad news for ethanol producers.