Huffington Post: Former Brazilian President Inácio Lula da Silva may be in hot water these days, but he was riding cool and easy in 2009, when he pledged to reduce his countrys greenhouse-gas emissions to a level roughly 17% below 2005s emissions by 2020. It was an astonishing ambition, especially for a developing country, because most of them werent promising to reduce their emissions so much as keep them from rising too much. Lulas pledge, though non-binding, was not only ambitious but eminently realistic....