In India, children are trained to monitor air and water quality, trees and green spaces using specially designed field kitsPhotograph: Jenny Zarins/Thames & HudsonChildren are empowered to lead their own programmes rather than being led by an adult, and they propose remedial action where problems are detectedPhotograph: Jenny Zarins/Thames & HudsonIn Argentina, artistic collective Ala Plastica has built emergency lodges in flood-risk areas in the delta of the Rio de la Plata, one of the largest water systems in South AmericaPhotograph: Alejandro Meitin/Thames & Hudson
One of Ala Plastica's biggest projects involved efforts to repair the environment and inform the public following a massive oil spill in 1999Photograph: Ala Plastica/Thames & HudsonIn Berkeley, California, the Edible Schoolyard is a one-acre organic vegetable garden and kitchen on the campus of Martin Luther King middle school that encourages children to learn about the importance of what they eatPhotograph: Justine Kurland/Thames & HudsonClasses involve all 950 pupils in every aspect of the seed-to-table process, from deciding what to plant to caring for and harvesting the produce, to cooking and eating it togetherPhotograph: Edible Schoolyard/Thames & HudsonIn Germany, a public green space was created at the site of a disused steelworks in the Ruhr Valley. One of the huge concrete coal-storage silos has been turned into a rock-climbing wall managed by a local groupPhotograph: Peter Liedtke/Thames & HudsonIn the UK, Common Ground promotes Apple Day, celebrating the diversity of traditional English apples and orchards which are under serious threat due to supermarket reliance on foreign importsPhotograph: Common Ground/Thames & Hudson
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