lelelele4679 lelelele4679
  • 01-11-2019
  • Biology
contestada

During an early phase of the planet's existence, Earth's atmosphere was similar in composition to the atmospheres of Mars and Venus. At that time Earth's principal atmospheric gas was:a. nitrogenb. carbon dioxidec. oxygend. water vapore. argon

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Gigi007
Gigi007 Gigi007
  • 02-11-2019
The answer is b. Carbon Dioxide
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