As UNFCCC negotiations move towards powerful new mechanisms for compensating tropical countries for their reductions of greenhouse gas emissions from deforestation and forest degradation, important questions remain: How much will REDD cost? Will it benefit forest people? Can forests in chronically cloud-covered countries be accurately monitored? These topics are addressed in four new studies just released by the Woods Hole Research Center in anticipation of the 13th Conference of the Parties of the UNFCCC.