Greene King cuts its carbon intensity by 26.7% year on year, according to its annual report.
Tonnes CO2e per £100k turnover fell from 12.546 in 2016/17 to 9.197 in 2017/18. Total gross emissions fell 21% year on year, from 253,141 to 200,208 tonnes of CO2e.
The company, which has a water licence, says it has saved 676,313 pints of water a day since commencing self-supply, cutting water consumption by more than 140,000m3 since 1 April 2017.
Greene King said it has trialled a system that will reduce the energy used by its main cellar chillers by up to 30% and plans to roll it out in 2018.
The firm made other incremental efficiencies: modifying a main refrigeration plant compressor to reduce electricity, water and chemical usage, and introducing a system to reduce compressed air usage during filling of casks, saved over 50MWh per annum, according to the report.
The company said it would rollout further energy saving measures next year and added that its Bury St Edmonds site has successfully transitioned to the new ISO14001 standard.
See the report here.