This chapter contain information that reflect the development of environment protection in China, including total water resources,
water supply and utilization, discharge and treatment of industrial and other waste water; urban air quality, emission and
treatment of waste gas; production, treatment and utilization of industrial solid wastes, collection and disposal of consumption
wastes in cities; national monitoring of road traffic noise and  urban environmental noise in key cities; land use, change in
cultivated land, forest resources, afforestation , and forest protection; cases of geological, seismic, marine and forest disasters,
environmental pollution or destruction accidents; investment in environment pollution treatment, etc.

1)   Coverage of statistics: industrial enterprises and other urban units which discharge pollutants.

2)    Survey methodology for discharge and treatment of industrial pollutants: comprehensive survey is conducted on all key
industrial enterprises, while overall estimation is carried out for ordinary enterprises.

Key enterprises refer to those enterprises which discharged more than 85% of all pollutants in the region.  For ordinary
enterprises whose discharge is less than 15% in the total of the region, estimation is made for the volume of their discharge of
waste water, oxygen required substances, ammonia and nitrogen, sulphur dioxide, industrial soot and dust, and solid wastes.
Data on discharge of pollutants of key and ordinary enterprises make up the total discharge of the region.

3)  Data on pollution from consumption and other sources are estimated using relevant statistics and technical parameters.

Data on environment pollution and treatment, pollutants from consumption, noise monitoring and on investment in the
treatment of industrial pollution are provided by the State Environment Protection Administration.

Data on water resources, collection and disposal of urban consumption wastes, land use and change in cultivated land, forest
resources, marine disasters, etc. are provided respectively by Ministry of Water Conservancy, Ministry of Construction, Ministry of
Land and Resources, State Forestry Administration and State Oceanic Administration.