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Greenhouse Gas  Emissions & Aerobic Compost Facts

updated Jan 11/2023

-EPA and USCC conclude aerobic composting does not contribute to CO2 emissions, the main contributors to greenhouse gas response and global warming

-Any emissions from aerobic composting are considered part of the natural carbon cycle

-Aerobic composting eliminates methane and nitrous oxide production

-Aerobic composting appears to be the safest way of converting organic waste streams into a stable value added product acting as a natural water filter when applied to land  

-Aerobic compost can be used as a landfill cover to reduce and eliminate methane emissions and odour as a result

-Our method of composting promotes carbon sequestering, creating more humus, helping stabilize larger amounts of carbon into long term storage while encouraging greater microbial activity for further carbon sequestering

-Aerobic compost creates a “sink”- (long term storage in the soil) helping reduce emissions in the atmosphere by sequestering (locking up) the carbon in the soil  

-Carbon is essential for soil stability and fertility

-Current estimates 20 million tons of carbon are stored annually in the US soil with the potential to store an estimated 180 million tons annually or 12 –14 % of annual emissions in the US, approximately 1.7 billion metric tonnes per year, there is an estimated 167 million acres of farmland in Canada

-Compost can also work as a bio filter for removing 80 –90 % of volatile organic compounds from gas streams substantially reducing odours

-The amount of structure in the windrow has a direct relation to the volume of CO2 emissions. Poor structure with excessive density requires additional turning and usually results in higher CO2 readings.

-Converting organic waste into aerobic compost provides us with the potential to enhance the growth of beneficial micro organisms in the soil, new or existing vegetation, allowing for more respiration in our atmosphere, which results in a reduction in CO2 levels and reduced fertilizer requirements


Spreading aerobic compost helps promote microbial activity in the soil 
which improves the growth of vegetation, resulting in greenhouse gas emission reduction. 

When the structure of the windrow is correct air flow is improved allowing the organic material being composted 
to breathe, reducing the levels of CO2 emissions. Compact windrows restrict access to oxygen,
increase CO2 levels and promote methane production. C/N ratios are very important.
When the C;N ratio is out of balance with excessive N, Nitrous oxide and methane emissions may become an unwanted by product causing odour issues.

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