Opinion, by Alfonso Stefanini
RIO DE JANEIRO, BRAZIL – Energy is at the center of every country's policy. The percentages that form Brazil's electric energy matrix vary from source to source, and with the information available to those not hacking into President Dilma Rousseff 's e-mails, one can say that about 70 percent of it comes from hydroelectricity. On the other hand, wind power corresponds to close to two percent of the total installed electricity capacity. According to sources, wind energy is . . .