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Subtopic: espionage.
Grades: 9-12 Subtopic: radiation Why is Coco orange?
Grades: adult Subtopic: indoor air Health Effects of Exposure to Secondhand Smoke Secondhand smoke can cause health problems in children and adults.
Grades: k-8 Subtopic: water Build Your Own Aquifer To illustrate how water is stored in an aquifer and how groundwater can become contaminated.
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