Question

Carbon dioxide was an abundant gas in the atmosphere in earth's distant past. Its subsequent decline was caused primarily by:

Answer 1

Answer:

Water vapor. Carbon dioxide was an abundant gas in the atmosphere in Earth's distant past. Its subsequent decline was caused primarily by: Cycling into the ocean, sediments, and bedrock

Answer 2

hey dude carbon dioxide is continually increasing , it's increment rate is at high level.

So we can't say that it is declining.

hope it helps you