Climate 'Reparations' for Poor Nations? Not So Fast. Cass Sunstein, September 20, 2015, Opinion. "There is unprecedented momentum for a real international agreement at the Paris climate talks in December: The U.S. is on track to make significant cuts in greenhouse-gas emissions, China has announced a cap-and-trade program and many others have made commitments of their own. The biggest obstacle? Justice -- or at least two ideas about justice. The first involves redistribution. As part of any agreement, poor nations, such as Brazil and India, want wealthier countries to pay them a lot of money, both for scaling back their emissions and for..."