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Gala2k [10]
3 years ago
12

Hundreds of millions of years ago, when fossil fuels were formed, large amounts of a carbon dioxide were trapped underground b n

itrogen were trapped in rocks during extensive volcanic activity c phosphate gas were added to the atmosphere through erosion and evaporation. d sodium were used to form ancient fossils, seashells, and limestone
Geography
1 answer:
Travka [436]3 years ago
8 0
B nitrogen were trapped in rocks during extensive volcanic activity 
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I hope this helps!

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