name 3 reasons why we need carbon dioxide. I think i know one.
but please help
Why aren't you using www.google.com for your questions?
https://www.google.com/search?q=why+we+need+carbon+dioxide&oq=why+we+need+carbon+dioxide&aqs=chrome..69i57j69i60.1876j0j7&sourceid=chrome&ie=UTF-8