Paris, France [International Herald Tribune] Voltaire’s “Candide” found an 18th century solution to the problems of the world: Cultivate the garden. Researchers are now developing a more advanced response: Cut the grass. … With oil this summer nudging toward $80 a barrel, interest in biofuel has gushed. Biofuel crops take in carbon dioxide when they grow, offsetting the greenhouse gases released when the fuel is burned. A rise in biofuel production could cushion the economic shocks caused by spiking oil prices.