The core of green chemistry is to reduce and eliminate the environmental pollution caused by industrial production from the source by using chemical principles. The following practices do not conform

The core of green chemistry is to reduce and eliminate the environmental pollution caused by industrial production from the source by using chemical principles. The following practices do not conform to the concept of green chemistry. A: The organic solvents in coatings are mainly benzene, esters, aldehydes and ethers. It contains harmful substances that endanger people's health. The development of water-based coatings instead of organic solvent-based coatings conforms to the concept of green chemistry, so A is not selected;

B, degradable and reusable products can reduce white pollution and conform to the concept of green chemistry, so B is not selected;

C, using concentrated sulfuric acid and copper to prepare copper sulfate, the harmful gas sulfur dioxide produced in the reaction process pollutes the atmosphere, which does not conform to the concept of green chemistry, so C is selected;

D, the atomic utilization rate of this reaction is 100%, and it does not produce pollutants, which conforms to the concept of green chemistry, so D is not selected;

So choose C.