Zhang Lijun, vice minister of environmental protection, made the remarks at a press conference on the sidelines of the annual session of the National People's Congress, the top legislature.
The government was considering to expand the category of "major pollutants" to include agricultural pollutants in drawing plans for the period from 2011 to 2015, he said.
The current scope of major pollutants includes sulfur dioxide and chemical oxygen demand (COD), a gauge of water pollution.
He said environmental protection would be used as a tool to facilitate economic restructuring and transforming the development pattern. Market forces and long-term mechanism should play a greater role, he added.
The country's COD and emissions of sulfur dioxide fell for four consecutive years after the target was set at the beginning of 2006, said Minister of Environmental Protection Zhou Shengxian in January.