THE GREEN PAD is an innovative product designed to increase levels of carbon dioxide in your indoor garden, absorbing your room’s humidity to power its CO2 generating reactions. Using a unique natural combination of carbons and acids that react to humidity to begin a measured release of CO2, THE GREEN PADS, when kept dry in their original packaging, will last well over a year. This allows you to use them only when you need them. The Green Pads are easy to use, each green pad is effective in an area of 60 to 120 cubic metres. Adding more green pads will certainly increase your PPM levels even higher.