Julia Roberts pumps up clean fuel

Julia Roberts is a spokesperson for Earth Biofuels in Dallas, the Associated Press reports.
Roberts will be the alternative energy company's spokesperson in promoting alternative fuel, and will chair the company's advisory board.
"It's very important that we expand our use of clean energy and make a long-term commitment to it," Roberts said in a statement. "Biodiesel and ethanol are better for the environment and for the air we breathe."
The actress will work with the company to try to get 500,000 school buses nation wide to switch to biodiesel fuel.

Actor Morgan Freeman and singer Willie Nelson are also on the Dallas Company’s board of directors.
Roberts recently appeared on the cover of Vanity Fair's first Green issue, which profiled stars' efforts to raise awareness of environmental issues. She, actor George Clooney, former Vice President Al Gore and environmental activist Robert F. Kennedy Jr. were pictured on the magazine's cover.