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ousmane021 added a news bookmark.Over the past few years, researchers have come up with many innovative ways to use human kinetic energy - from powering soccer fields to playgrounds and classroom lights. Now so...Over 6 years ago
ousmane021 added a news bookmark.On April 22, 1970, twenty million people across the United States took to the streets to ask government officials to take preventive measures to protect the environment. Today, ...Over 6 years ago
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