In Argentina, some shopkeepers offer seeds instead of small change
Indian villagers turn invasive water hyacinths into sustainable livelihoods
Five inspiring stories of our Observers taking action to help the world in 2017
Migrants on Lesbos turn discarded life jackets into accessories
DRC entrepreneurs fight unemployment with local cooking
African migrants in Italy launch organic yoghurt, vegetable business
Recycled soap helps kids fight poor hygiene in rural Cambodia
Welcome to "Silicon Mountain," Africa's next tech hub
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Fighting hunger, food waste in Argentina with free-service fridges
How a coal-powered dryer is stopping Niger's tomatoes going to waste
Making skateboards out of discarded fishing nets
Inventors find new uses for 'pest' plant in Senegal and Mauritania
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A sustainable heaven in the Peruvian jungle
Senegalese inventor builds plane with salvaged parts
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