Inter Press Service: The United States will work on energy issues with the other countries of the Americas based on “a variable geometry,” allowing governments to choose to cooperate in some areas but not others, said Jeremy Martin, head of the energy programme at the Institute of the Americas at the University of California San Diego. This “a la carte” approach would make it possible to work with Venezuela on the heavy crudes in its Orinoco Belt and with Brazil on ethanol, or with Mexico and Brazil on …