Beijing has said its emissions of the greenhouse gases that cause climate change will carry on rising until "around 2030".
It frequently prefers to point instead to its achievements in energy intensity - the amount of power used per unit of GDP - which it has repeatedly reduced in recent years.
Last year it cut it by "at least 5.6 per cent", the National Development and Reform Commission (NDRC), the country's top planning body, said in a report to the National People's Congress, the country's Communist-controlled parliament.
Similarly, carbon dioxide emissions per unit of GDP went down "at least six percent", the NDRC said, but the 2016 target was set at 3.9 per cent.
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Other pollutants also had weaker targets for this year than had been achieved in 2015.
China's rise to become the world's second largest economy was largely powered by cheap, dirty coal. But as growth slows, the country has had a difficult time weaning itself off the fuel, even as the pollution it causes wreaks havoc on the environment and public health.
Yet there are widespread doubts over the accuracy of official statistics in China, which critics say can be subject to political manipulation.
It emerged in November that China had been under-reporting its coal consumption for years, prompting a revision of official data that shot the figure for 2012 alone up 17 percent, or 600 million tonnes.
Parts of China are often blanketed with toxic smog, much of it the result of using the fuel in industries such as power generation and steel.
"We should strive for major progress in the control and prevention of air pollution," Premier Li Keqiang told the NPC's opening session today.
Within five years, he said, city air quality should be rated "good" or better 80 per cent of the time.