Mongabay: One of the biggest ideas in the conservation world over the past decade is Payments for Environmental Services, known as PES, whereby governments, corporations, or the public pays for the environmental services that benefit them (and to date have been free), i.e. carbon, biodiversity, freshwater, etc. For example, Reducing Emissions through Deforestation and Forest Degradation (REDD+) is the largest such proposed PES concept, yet many others are emerging. However, a new study in …