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Green Gas Certification Scheme
Syed Ahmed
17 November 2016
GGCS & WRI
• Discussions with Washington-based WRI: – Scope 1 CO2 emissions linked to biomethane
use – w/ GGCS Green Gas Certificates - are zero – But Scope 1 emissions must measure CH4 and
N2O emissions that arise out of combustion (these are very (very) small)
– So total Scope 1 GHG emissions not zero – but are very small
– Advised that – biogenic CO2 emissions must be measured – but not included in the Scopes – included as an ‘off memo’ item
Green Gas Certificates in action
• The following is from 'Sainsbury’s Annual Report and Financial Statements 2016'.
Overall emissions have been presented to reflect both location and market based
methodologies, affecting both Scope 1 & Scope 2 emissions. Scope 1;
12 per cent of total natural gas usage is covered by Green Gas Certification
(100 per cent Renewable Gas Guarantee of Origin Contract); therefore 12 per
cent of natural gas emissions have been reported at zero emissions. All other
Scope 1 market-based emissions have been calculated using UK
Government’s GHG Conversion Factors for Company Reporting 2015 for all
sources. Scope 2; 17 per cent of UK electricity is covered by a PPA, which
meets all of the required quality criteria; therefore 17 per cent of UK electricity
emissions have been reported at zero emissions. Remaining UK electricity has
been reported at supplier-specific emissions rate. Non-UK electricity has been
reported at local grid average. [page 60]
DEFRA Environmental Reporting • GGCS contacted DEFRA on use of GGCs
in 2013
• Consultation issued in February 2014
• “a company may account for CO2 emissions from the combustion of natural gas within the biogenic section of their inventory and not within the scopes if they hold documents certifying that biomethane has been injected onto the grid. For every unit of natural gas combusted and accounted for in this way, the organisation would have to retire certificates for an equivalent number of units of biomethane.”
• However, final conclusions not published. June 2013 Guidance still must current.
Green Gas Certificates – Future Opportunities
• 4TWh – supply to around 300,000 homes • All recent projection work from a number of
organisations point to significant increases in the quantity of green gas injected into the gas grid
• In addition to biomethane – other green gas solutions include biopropane, BioSNG and renewable hydrogen
• Increased interest by Government in biomethane to grid – recent RHI consultation suggested 20 projects per year going ahead in 2020s
• Significant opportunities in transport sector
