Humans use carbon dioxide to keep their blood balanced so it is not too acidic or too bacic
because plants breathe in carbondioxide and breathe out oxygen which animals and human breathe in if there is no carbondioxide there will be no plants ,no animalsand no humans which means no life on earth.
plants. when humans exhale carbondioxide, plants take it in and turn it back into oxygen. especially trees
Plants give out oxygen which we take in and then we give out carbon dioxide which the plants take in
carbondioxide
j.black
Carbondioxide
we breath carbondioxide
carbon dioxide makes oxygen which means its carbondioxide
CarbonDioxide =]
It's CO2
lime water
Plants use co2 as a way to produce a special sugar that they eat. They only use the carbon and realise the remaining oxygen (o2).