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Correct Answer: A) UV rays.
Correct Answer: C) Migration toward the poles.
Correct Answer: A) Clean exhaust gas from burning coal.
Correct Answer: A) Rain or snow have become acidic from pollution.
Correct Answer: A) Temperature Inversion.
Correct Answer: A) Ozone that comes from vehicle emissions.
Correct Answer: C) It is absorbed by the plants and slows down photosynthesis.
Correct Answer: C) It increases the chances of skin cancer.
Correct Answer: A) A pH less than 5.
Correct Answer: C) Greenhouse Gasses.
Correct Answer: A) Burning fossil fuels.
Correct Answer: B) 600, 000.
Correct Answer: D) Can lower the level of oxygen carried in the blood.
Correct Answer: D) Carbon Dioxide.
Correct Answer: B) Methane.
Correct Answer: A) Gas and fumes from vehicles.
Correct Answer: D) Acid rain.
Correct Answer: B) Loss of habitat for animals.
Correct Answer: B) Dust particles.
Correct Answer: C) The EPA.
Correct Answer: D) Increased birth defects.
Correct Answer: A) Moving air.
Correct Answer: B) Protects us from the sun's UV radiation.
Correct Answer: B) Primary Pollutant.
Correct Answer: C) Dense traffic caused extreme pollution.