BBC: Confusion over the types of coal being burned in Chinese power stations has caused a significant overestimation of the country's carbon emissions.
Researchers, published in the journal Nature, say existing CO2 calculations had used a globally averaged formula.
But when scientists tested the types of coal actually being burned in China, they found they produced 40% less carbon than had been assumed.
The study says the error amounted to 10% of global emissions in 2013.
China's drive for...