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Fill in the blanks with the appropriate term for each item.
1. Air pollution includes chemical substances and_______released into the atmosphere.
2.______is a metal released into the air by burning coal that causes
nerve poisoning
3. Rain that has a lower pH than normal rain is called __ rain.
4. Carbon dioxide causes global warming by increasing the______effect.
5. Radon gas may seep into buildings from underground______
6. Sulfur and_____oxides are air pollutants that lower the pH of rain.
7. Exposure to radon gas may cause_____canser​