Explain: Why Is Air Pollution a Problem?

Materials

For each team of 3 students:

• 2 zip-top plastic sandwich bags
• 2 paper towels
• 20 radish seeds
• 25 or 50 mL graduated cylinder
• 20 mL of water
• 20 mL of acid water
• permanent marker
• 3 pairs of latex gloves (optional)