February 18, 2007 11:36am CST
As we all know, the petroleum (a product from crude oil)is a non-renewable resource. It will get extinct within another twenty years. We have to live without petrol. What do you think is the best renewable resource as an substitute or alternative to petroleum?
1 response
• China
20 Mar 07
In my opinion, hydrgon is the best renewable resouse for it.Hydrgon can get from water by decompose.Energy should using sun enery and wind energy etc.