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Gr 2–4—Double-page spreads explain what kinds of pollution are impacting the earth: air pollution, acid rain, noise pollution, farming, water pollution, waste, and global warming. "Eye-Spy" boxes ask readers to look for pollution. "Discover It Yourself" activities are included. Some activities are simple and can be done alone, such as putting Vaseline in three lids and placing them in three different locations to examine air pollution. Others that require adult supervision are ma...Log In or Sign Up to Read More