Grist: It may be hard to recall amid all the bad news coming from Brazil these days -- the country`s worst recession in 30 years, its unprecedented corruption crisis, and above all the May 12 Senate vote to suspend President Dilma Rousseff and begin an impeachment trial against her -- but this country has in recent years occupied a position of critical global leadership on climate change. Brazil is the worlds biggest reducer of greenhouse gas emissions, having slashed Amazon deforestation about 80 percent...