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In this activity, learners explore clouds and how they form.

In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

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.

Learners observe a simple balloon model of an electrostatic precipitator. These devices are used for pollutant recovery in cleaning industrial air pollution.

In this activity, learners explore a bucket of sand and beach objects.