Brazil has narrowly tailored its cleanenergy innovation to biofuels. Commercial investment in innovation has, predictably, flowed mainly into improvements of existing technology, which in Brazil means first-generation sugar-cane ethanol for cars. Yet on the most important international frontier for biofuels-so-called secondgeneration cellulosic ethanol, which uses waste or crops grown on land that cannot be used to produce food-Brazil is relatively quiet. Its Center for Sugarcane Technology, a cooperative consisting of many of the country's sugar-cane producers, has built a small pilot facility; Embrapa, the government organization that supports agricultural research, is scheduled to complete a similar center this year; and the newly founded Brazilian Bioethanol Science and Technology Laboratory is planning a third for next year. The United States, in contrast, is home to more than three dozen commercial or pilot cellulosic ethanol plants.