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20 October, 16:13

What are some primary contributors to background radiation?

cars, jets, and trains

televisions and computers

fossil fuels and oxygen

plants, animals, and cosmic rays

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Answers (2)
  1. 20 October, 18:03
    0
    Plants, animals, and cosmic rays
  2. 20 October, 19:59
    0
    plants animals and cosmic rays
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