BRASILIA (Reuters) - After years at each other's throats, Brazil and the United States are working together to promote the use of ethanol in a collaboration that could revolutionize global markets and the makeup of the biofuel itself.
The breakthrough came in January when Washington allowed a three-decade-old subsidy for U.S. ethanol producers to expire and ended a steep tariff on foreign biofuels. The tariff, in particular, had poisoned diplomatic relations between the world's top two ethanol-producing countries for years.
