Bloomberg: Brazil may see a mass migration of crops and farm workers from huge swaths of currently tillable lands to more temperate zones as global warming takes hold, according to leading climate experts in the country. Longtime Brazilian climate researcher Hilton Silveira Pinto points to the drought thats cutting grain and coffee output this year as an indicator that rising global temperatures may already be impacting the countrys crops. "This is a taste of what is to come in the future," said Pinto,...