Can a pest species earn you more than the principal crop?

In October 2020, Krishnanunni Mavinkal Ravindran defended his Master thesis at Dept. of Food and Resource Economics (IFRO), University of Copenhagen. In this article, he tells about the fieldwork experience in Ghana. Krishnanunni studied the contribution of an edible pest species - shea caterpillars - to rural livelihoods in Ghana and the accessibility constraints associated with its harvest.
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No such thing as waste: resource recovery and shifting perceptions

‘Out of sight, out of mind’ is a well-known expression, but one with pernicious effects in the context of waste. We’ve always done things a certain way. Things are made, used, and thrown away. But where do all these thrown-away things go? What do they become? What could they become? Our linear way of thinking and behaving is being increasingly criticised as landfills overflow, water supplies dry up, and air becomes unbreathable.
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