Guardian: No country has a larger stake in reversing the impact of global warming than Brazil. That is why it is at the forefront of efforts to come up with solutions that preserve our common future, without jeopardising the livelihood of millions of impoverished people who live off the land. Brazil has policies aimed at conserving the Amazon forest and its priceless natural heritage. But the forest is also home to a culturally diverse population of 25 million, including some 170 indigenous …