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The high-yielding varieties of green revolution have already caused severe genetic erosion in agriculture . After completion , the newly painted green barn has been used as a gathering place for family and local groups . In the meantime , the forest began to change its hues , losing that lively green which had embellished its arches , in the graver light which is the usual precursor of the close of day . In the densely crowded Oshodi Market , vaccinators recognizable by their green aprons had to struggle past the market stalls to reach children sitting with their mothers or being carried in slings on their mothers ? The river below , winding between wooded banks , and everywhere the same splendour of varied green which had delighted their eyes all the morning . One part of the original crater with its green Trinitite has been preserved under a low shelter with windows in the roof .