Scottish Power has the next cheapest deal at £729 a year. UK energy company Good Energy has launched a carbon neutral “ green gas ” tariff . It will include 6 % biomethane produced within the UK using organic material such as sewage and manure . Any emissions generated by customers will be offset through carbon - cutting schemes in Malawi , Nepal and India . The founder of the company , Juliet Davenport , says that domestic gas is responsible for 26 % of most individual ’s carbon footprints . The biogas sector looks set to become more widespread as the number of anaerobic production sites increases . Other British companies , including Ecotricity , Green Energy UK and Bulb , also offer green gas . Paul Vince , founder of Ecotricity , states that 95 % of British gas could potentially be produced from grass on marginal farmland by 2035 .
UK energy company Good Energy has launched a carbon neutral “ green gas ” tariff . It will include 6 % biomethane produced within the UK using organic material such as sewage and manure . Any emissions generated by customers will be offset through carbon - cutting schemes in Malawi , Nepal and India . The founder of the company , Juliet Davenport , says that domestic gas is responsible for 26 % of most individual ’s carbon footprints . The biogas sector looks set to become more widespread as the number of anaerobic production sites increases . Other British companies , including Ecotricity , Green Energy UK and Bulb , also offer green gas . Paul Vince , founder of Ecotricity , states that 95 % of British gas could potentially be produced from grass on marginal farmland by 2035 .