Which major gas in today’s atmosphere was introduced by living organisms about 2.7 billion years ago?

Question

asked Oct 27, 2020 212k views

2 Answers

JDMX · Answer 1 · 2020-11-02T03:43:53+0000

Answer:

Oxygen

Step-by-step explanation:

Oxygen is the major gas in today’s atmosphere that was introduced by living organisms about 2.7 billion years ago.