March 28, 2017

Post a New Question

Posted by on .

Why is the Earth's atmosphere rich in oxygen and poor in carbon dioxide?

  • earth - ,

    Photosynthesis over billions of years, mostly by primitive life forms such as algae. This process removes CO2 and releases O2.

    CO2 is, however, making a comeback.

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question