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17 questions
What gas is released into the atmopshere when fossil fuels are burned?
oxygen
carbon dioxide
nitrogen
argon
Which gas makes up 78% of the atmosphere?
ozone
oxygen
nitrogen
water vapor
Which gas is released into the atmosphere by plants following photosynthesis?
Oxygen
Argon
Carbon dioxide
Nitrogen
What gas in the air is causing global warming?
carbon dioxide
oxygen
helium
What layer protects us from the sun's harmful rays?
protection layer
ozone layer
atmospheric layer
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