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    WGBH
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    Have you noticed the plastic rings that are used to hold six-packs of soda? Those rings are great for carrying cans, but they're real trouble when they become trash that animals can get...

    $1 - $5 Ages 8 - 14 45 to 60 minutes
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    Mount Holyoke College
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    In this activity with several mini experiments, learners explore the chemistry that helps scientists learn about the environment and how they can help save it. Learners will determine if pollutants...

    $1 - $5 per group Ages 8 - 14 4 to 24 hours
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    National Health Museum
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    In this activity, learners receive a labeled plastic film canister containing a material representing a pollutant (i.e. pencil shavings = a beaver's wood chips). The instructor (or a learner)...

    $10 - $20 per group Ages 8 - 18 45 to 60 minutes