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How was the early atmosphere mainly different from the present atmosphere?

Answer and explanation

Correct answer: It had very little free oxygen

Low free oxygen was a major difference from today's atmosphere. Exam tip: keep oxygen as the main point in comparison.

Related tags

Early AtmosphereFree OxygenPresent AtmosphereEvolution Of The EarthThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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