Chemistry is a double-edged sword, which cuts the rope of poverty and opens the door to disaster. Green chemistry was put forward by some people of insight in the dilemma of chemistry.

Green chemistry, also known as environment-friendly chemistry, has the following main characteristics:

(1) Make full use of resources and energy, and adopt non-toxic and harmless raw materials;

(2) It is carried out under non-toxic and harmless conditions to reduce the discharge of waste to the environment;

(3) Improve the utilization rate of atoms, try to make all atoms as raw materials be consumed by products, and realize "zero emission" of waste;

(4) To produce environmentally friendly products that are beneficial to environmental protection, social security and human health.

The core of green chemistry is to eliminate pollution from the source by using chemical principles. Humans call for green chemistry, which is a prescription for themselves. It will change the face of chemical industry, benefit future generations and make chemistry develop in a healthy direction.

The traditional chemical industry has not only created great wealth for mankind and improved the quality of human life, but also brought profound disasters to mankind. At present, the world's environmental pollution problem is very serious, producing 300 million tons and 400 million tons of harmful waste every year, endangering the environment and threatening human survival. A large number of harmful gases are discharged into the atmosphere, which makes the air quality decline day by day. The greenhouse effect has melted a large number of glaciers and snow-capped mountains and raised the sea level. The green forests on the earth's surface are gradually decreasing, sandstorms are rampant, and human survival is swallowed up by the desert bit by bit; The waste water and waste residue discharged from chemical plants, pharmaceutical factories and paper mills make rivers, lakes and seas turbid, fish and shrimp can't survive, algae grow wildly, and a large area of water is flooded; A large number of germs are waiting for opportunities to enter, and human beings and even livestock are always troubled by some strange diseases of unknown origin. The earth calls for green chemistry, and mankind calls for green chemistry. Note that green chemistry can never be understood as green chemistry, but as environment-friendly chemistry.