The basic premise of the Reducing Emissions from Deforestation and Degradation (REDD+) program seems simple: rich nations pay tropical countries for preserving their forests. Yet the program has made relatively limited progress on the ground since 2007, when the concept got tentative go-ahead during U.N. climate talks in Bali. The reasons for the stagnation are myriad, but despite the simplicity of the idea, implementing REDD+ is extraordinarily complex.
Still the last few years have provided lessons for new pilot projects by testing what does and doesn't work. Today a number of countries have REDD+ projects, some of which are even generating carbon credits in voluntary markets. By supporting credibly certified projects, companies and individuals can claim to "offset" their emissions by keeping forests standing.