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This warm weather activity introduces learners to the impact trees have on blocking the sun's heat and reducing temperature on the Earth's surface.

In this simulation activity, learners observe what can happen when ocean waves churn up water and oil from an oil spill.

In this simulation, learners explore how ocean currents spread all kinds of pollution—including oil spills, sewage, pesticides and factory waste—far beyond where the pollution originates.

Millions of organisms can live in and around a body of water.