SINGAPORE, June 5 (Reuters) - China's largest oil and gas group China National Petroleum Corp (CNPC) cut its methane emissions intensity last year by 11.39%, steady from the previous year's 11% reduction, the state energy giant said in its 2023 environmental report on Wednesday.

CNPC stepped up checks and repairs on oil and gas leaks at production sites and switched off more gas flares, helping to curb methane emissions.

Agriculture and energy are among the top sources of methane emissions, which are harmful for crop yields, air quality and also cause human and animal diseases.

COP28 President Sultan Al Jaber said in March that CNPC would soon join a pledge by oil and gas companies to cut methane emissions to zero by 2030.

CNPC also said in its report that the company's total greenhouse gas emissions amounted to 188 million metric tons of carbon dioxide equivalent last year, "largely steady" compared with 2022.

This is the first time CNPC has reported greenhouse gas emissions in outright volumes. Last year the group said its greenhouse gas emissions to generate each unit of oil and gas production in 2022 fell by 4% from the previous year.

Of CNPC's total greenhouse gas emissions last year, 145 million tons were under scope 1 (from company's operations) and 43 million tons were scope 2 (indirect emissions).

CNPC, parent of PetroChina , added more than 5 gigawatts of solar and wind power installations last year. It also invested in carbon capture and storage facilities but provided no further details on those.

CNPC produced 105.8 million tons, or 2.12 million barrels per day of crude oil domestically last year, accounting for a half of China's total. Its domestic natural gas output totalled 153 billion cubic meters, about two thirds of the country's total.

(Reporting by Chen Aizhu Editing by David Goodman)