Determination of the Greenhouse Gases Associated with Peat and Peat-Alternative Products (Defra project IF0154).
This preliminary investigation undertook ‘traditional’ lifecycle assessment and PAS 2050 compliant assessments of CO2 emissions from peat and other substances commonly used in horticultural growing media. The interpretation of the significance of biogenic carbon (i.e. that which is sequestered and re-released within tens of years) vs ancient carbon (i.e. that which is sequestered over thousands of years) is key to drawing conclusions on the impacts of peat use on climate change. Many LCA studies discount biogenic carbon as there is no net emission between its sequestration and re-release to the atmosphere. Both approaches have been reported here.
Project leader: Rob Lillywhite