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Learners observe and discuss a simple model of a wet scrubber, a device for cleaning industrial air pollution.

Scientists use enormous wind tunnels to test the design of planes, helicopters, even the Space Shuttle.

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

Learners observe and discuss a vacuum cleaner as a model of a baghouse, a device used in cleaning industrial air pollution.

In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment.