InstructionPrimary heating, iron and metallic groups and thermal strength plant life in city wintry weather are large-scale coal-fired manufacturing, which has come to be the supply of air pollutants. in latest years, all localities have followed lively environmental protection guidelines. in

InstructionCentral heating, iron and metal organizations and thermal electricity flowers in urban wintry weather are large-scale coal-fired production, which has grow to be the supply of air pollution. in recent years, all localities have followed active environmental safety policies. in mixture

InstructionCentral heating, iron and steel enterprises and thermal power plants in urban winter are large-scale coal-fired production, which has become the source of air pollution. In recent years, all localities have adopted active environmental protection policies. In combination with the actual