Benefits of CO2:
CO2 is essential to growth and development of all plant life.
The naturally occurring concentration of CO2 in the air is around 400ppm (parts-per-million). If you are growing outdoors, you will be limited in introducing additional CO2 to your plants.
However, growing indoors presents the opportunity to introduce extra CO2 to the benefit of plants.
When you are able to raise the concentration of CO2 in the grow room to between 1,200-1,600ppm, you will see heavier yielding plants that develop much faster, and are heat resistant.