BRAZIL — Marina Silva, a former environmental minister and potential candidate for the job again, on Saturday brought a message to the U.N. climate summit: Brazil is back when it comes to protecting the Amazon rainforest, the largest in the world and crucial to limiting global warming. The recent election of leftist President-elect Luiz Inácio Lula da Silva represents a potentially huge shift in how Brazil manages the forest compared to current President Jair Bolsonaro. …“Brazil will return to the protagonist role it previously had when it comes to climate, to biodiversity,” said Silva, who spoke with reporters at the Brazilian Climate Hub. …Upon winning the October elections, da Silva, president between 2003 and 2010, promised to overhaul Bolsonaro’s policies and move toward completely stopping deforestation, referred to as “Deforestation Zero.”