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Tokens are then issued using the Emissions Tokens Network Project.

The Decarbonization DAO will govern the decarbonization of the emissions, by certifying carbon credits that will be considered valid emissions reductions.  It may include certificates of sustainable fuel, such as those from the Reducing Methane Leakage and Flaring through Supply Chain Tokens, or carbon offsets where no direct emmissions reductions are available.

  Transportation and shipping emissions are calculated based on standard emissions factors such as the UK Government Greenhouse Gas Reporting Factors (see below) and stored as Audited Emissions.  The CarbonTracker tokens from the Oil & Gas Methane Emissions Reduction Project will be used to calculate the actual carbon emissions of fuel based on the producer it was purchased from.  This is done by calculating the carbon intensity implied by the standard emissions factors and comparing it against the CarbonTracker tokens' fuel carbon intensity.  By presenting an Audited Emissions tokens based on the standard emissions factors and a CarbonTracker token for actual fuel purchased, the smart contract will calculate the difference and issue an additional Audited Emissions token.  This new token represents the adjustment for actual emissions based on the purchased fuel's carbon intensity, versus the "average" carbon intensity of the standard fuel.  It may be a positive or negative number, depending on the actual purchased fuel's carbon intensity versus the average.  

The Decarbonization DAO will govern the auditing and calculation of the carbon intensity of the different producers' fuels, validation of sustainability attributes of different fuels, and any carbon offsets in addition to direct emissions reductions.The certificates or offsets will be tokenized to allow the parties to purchase and retire them to support the overall decarbonization of the supply chain. 

References