China's national voluntary greenhouse gas emission reduction trading system saw 316,872 tonnes of certified emission reductions (CCER) change hands on Aug 3, with turnover of 29.21 million yuan ($4.30 million) at an average price of 92.18 yuan/t, exchange data showed. Cumulative volume since the market's launch reached 18.16 million tonnes as of Aug 3, with total turnover of 1.40 billion yuan.