Virgin Atlantic President Richard Branson said the test flight would help the airline to use clean fuel sooner than expected.
CNN: Biofuel-powered jet makes test flight
We're expanding the use of hybrid and clean diesel vehicles and biodiesel fuel.
NPR: President Bush's Remarks on the World Agenda
The RPS would require utilities to use a minimum percentage of clean power--such as wind, hydropower or solar energy--in their overall fuel mix, or it would require electric companies to buy renewable credits from each other.
FORBES: Magazine Article
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