Are machinery factories and warehouses light polluting enterprises? Why are steel plants and cement plants heavily polluting enterprises? Next (see

Machinery factories and warehouses will produce a small amount of dust, causing light pollution; Steel mills and cement plants will produce a lot of dust, causing serious pollution; Dust from cement plants can also cause air pollution; Chemical substances volatilized from breweries can also cause air pollution; Printing and dyeing factories, paper mills, electroplating factories and leather factories will discharge a lot of sewage in the production process, causing water pollution; Chemical plants and oil refineries will volatilize chemicals, and power plants will also discharge sewage. Iron and steel plants will produce waste gas and dust, and there will be a lot of waste residue, so there is air pollution and waste pollution.