Mongabay: While much has been written about the potential of reducing greenhouse gas emissions by protecting tropical forests, a proposed program to do just that has been challenged by a number of factors, including concerns about the accuracy of measuring for carbon reductions. Failure to properly account for carbon could undermine the effectiveness of the Reducing Emissions from Deforestation and Degradation (REDD+) program as a tool for mitigating climate change and securing benefits for local people. At...