The UK energy sector slashed emissions by 23% between 2012 and 2014.
It emitted 121 million tonnes of CO2 during the same period, new figures from the Department of Energy and Climate Change (DECC) revealed.
The report stated carbon intensity for all fuels in the country, including nuclear and renewables stood at 394CO2/kWh in 2014 from 482CO2/kWh in 2012.
The energy supply sector was the largest contributor to this decrease between 2013 and 2014, the report added.
Since 2013, emissions from power stations decreased by 18%.
It stated: “Low carbon electricity’s share of generation increased from 30% in 2012 to a record 39% in 2014. Renewables’ share of generation increased from 11% in 2012 to 19% in 2014, also a record high.”
Renewable electricity generation rose 21% last year to 64.7TWh, while gas production reached 5.6% to 101TWh.
Nuclear output fell 9.7% to 64TWh due to planned and unplanned outages, DECC said.
Coal generation generation decreased 23% to 101TWh.
Earlier this year the government announced it will close coal-fired power plants in the country by 2025 and replace them with gas-fired power stations.
It is also supporting nuclear generation as it will invest £2 billion in the Hinkley nuclear plant.