Only ZeoCarbon Sweetfilters (registered with the USPTO) remove Odor, CO2, and other Greenhouse Gases. Typically, after 5 years of work, the ZeoCarbon is returned to the soil as a nitrogen rich ornamental plant fertilizer. It takes up to one year for one tree to fix the CO2 in the equivalent of 3 litres of gas. One septic vent pipe filter can be equal to just over five trees (5.33 trees) or one carbon credit. Refilled as needed to stop odor over a 100 year period.
Sweetfilters can erase your yearly CO2 footprint completely.