[填空题] New Energy Sources to the Rescue
As petrol prices rise, policy makers and venture capitalists are suddenly embracing alternatives. Will the trend last
Reasons for the change
In his long career in country music, Willie Nelson has always been on the left side of all things. Now, at 73, he is in the vanguard. Mr. Nelson, who lives on a big farm outside Austin, powers his car with the help of vegetable oil. He has even created his own line of this cleaner-burning diesel blend (混合柴油). He called it "BioWillie", which is distributed at several sites in Texas and is going national, too. Mr. Nelson argues that it will help America’s farmers, truckers and the environment while, at the same time, reducing dependence on foreign petroleum.
With high petrol prices causing troubles in Washington, D.C., everyone is trying to find out alternatives. Soya beans, canola (rapeseed), switch grass, anything, is being investig