By breathing, burning fossil fuels, ...
Carbondioxide (CO2)
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
no it burns the oxygen and releases co2 (carbondioxide) among other pollutants
Carbondioxide
we breath carbondioxide
j.black
carbondioxide
The person breathes in oxygen and breaths out carbondioxide back into the spirometre. Because the carbondioxide can become a saftey hazard, soda lime is placed in the spirometre to remove the carbondioxide, however the volume of carbondioxide is equal to the volume of oxygen, as the oxygen is not being replace, so removing the carbondioxide removes the oxygen as well, making the spirometre drop.
CarbonDioxide =]
It's CO2