Mongabay: Paying for the ecological services provided by the Amazon rainforest could be the key to saving it, reports a new analysis from WWF. The study, Keeping the Amazon forests standing: a matter of values, tallied the economic value of various ecosystem services afforded by Earth’s largest rainforest. It found that standing forest is worth, at minimum, $426 per hectare per year for production of non-timber forest products (honey, fiber, mushrooms, medicinal plants, etc), erosion …