Guardian: Outside Dr Gilberto Câmara’s office, there is a large and beautiful satellite map of Brazil. From the fractal elegance of the Amazon and its tributaries, to the ochre fields holding sugar, soy and cattle, to the twinkling mega-cities of São Paolo and Rio de Janeiro in the south, the map shows why he thinks Brazil can be the world’s first environmental superpower. Cãmara leads Brazil’s National Institute for Space Research (INPE). His startling claim, he explains in his easy English, …