What is the great contribution of chemistry to mankind in the 21st century?

Pros: 1. The use of chemical fertilizers and pesticides has increased the yield of crops;

2. The synthesis of new drugs has saved millions of lives;

3. The development of clean and pollution-free energy will change our blue sky and clear water.

Disadvantages: While promoting development, it will inevitably bring some disadvantages. The mass production of the national economy requires a large number of raw materials, which causes a large amount of resources to be consumed in order to produce, which will cause great harm to the environment in resource exploitation;

In production, there will be a lot of production wastewater, and some unscrupulous manufacturers will directly discharge the sewage that does not meet the standards, causing serious harm to the environment and residents; In the later stage, many chemical products cannot, such as plastics, etc., will also cause environmental pollution.

1. To ensure the survival of mankind and continuously improve the quality of human life.

1) the use of chemicals to produce fertilizers and pesticides to increase food production;

2) the use of chemical synthesis drugs to inhibit bacteria and viruses and protect human health;

3) the use of chemistry to develop new energy and new materials to improve the living conditions of human beings;

4) The use of chemistry to apply natural resources and protect the environment.

In order to make human life better.

2. The core knowledge of chemistry has been applied to all areas of the natural sciences, and chemistry is an important pillar of the powerful force that transforms nature.

3. The intersection and penetration of chemistry and other disciplines have given rise to many marginal disciplines, such as biochemistry, geochemistry, cosmochemistry, ocean chemistry, atmospheric chemistry, etc., which have led to the rapid development of science and technology such as biology, electronics, aerospace, radical positive light, geology, and oceanography.

The 20th and 21st centuries were the century of chemistry, and the contribution of chemistry to mankind was enormous, almost everywhere we are familiar with: industrially: plastics, which are things we have to touch every day, computer cases, keyboards, mice, plastic cups, slippers, clothes, are inseparable from plastics.

And the plastic raw material is through petrochemicalization.

1.Chemistry plays an important role in guaranteeing the survival of human beings and continuously improving the quality of life of human beings. Such as:

the use of chemicals to produce fertilizers and pesticides to increase food production; The use of chemical synthesis of drugs to inhibit bacteria and viruses to protect human health; the use of chemistry to develop new energy and new materials to improve the living conditions of human beings; The use of chemistry to comprehensively apply natural resources and protect the environment to make human life better.

2.Chemistry is a practical discipline, which, together with mathematics, physics and other disciplines, has become the foundation for the rapid development of natural sciences. The core knowledge of chemistry has been applied to all areas of the natural sciences, and chemistry is an important pillar of the powerful force that creates and transforms nature.

At present, chemists use the perspective of chemistry to observe and think about social problems, and use the knowledge of chemistry to analyze and solve social problems, such as energy problems, food problems, environmental problems, health problems, resources and sustainable development problems.

Chemical example: clothing: chemical fiber woven stool mascot makes the color and texture of clothes colorful.

Food: The use of food additives and preservatives is an increasingly diverse food variety.

Housing: The use of new materials makes housing more environmentally friendly and comfortable.

Line: The development of alloy and rubber products makes travel convenient and fast.

Use: The successive rough bending of various materials makes the various tools we use more dexterous and lightweight.

Since the Industrial Revolution, especially since the second scientific and technological revolution, human life and chemistry have become increasingly closely linked. Agricultural production is largely supported by the fertilizer industry; Diesel locomotives, airplanes, and most automobiles are fueled by petrochemicals; Many clothes use chemical fibers as materials (polyester, nylon, spandex......Even fabrics made of natural fibers require chemically synthesized dyes to color; Soap, laundry detergent, facial cleanser, etc. come from the daily chemical industry; Polyurethane will be used in the sole; Polyvinyl chloride and phenolic resin for pipes and insulation, PTFE for filler for joints and inner wall of non-stick pan; After the phase-out of polystyrene (styrofoam), more polypropylene is used in tableware, polycarbonate is used in large buckets of water and many water cups, and plastic bags and plastic wrap used in supermarket shopping are polyethylene; All kinds of paints and glues are almost all synthetic materials; The vast majority of Western medicines come from chemical synthesis; Materials for various electronic devices (semiconductor materials) come from the metallurgical and chemical industries; The above various chemical industry fields often need the chemical production of three acids and two alkalis to support. Without the chemical industry, human society would lose the support of various new substances and materials, and thus go back by decades or even hundreds of years.

A soda ash, limestone, quartz as raw materials can be used to make ordinary glass; Cellulose has naturally occurring, for example, cotton contains cellulose, penicillin is a well-known antibiotic, it is produced by Penicillium in fungi, can be a variety of bacterial diseases, can also be synthesized, so a wrong;

b Urea is found in urine and sweat, and urea can also be synthesized artificially; Seawater contains a lot of table salt, so table salt is naturally occurring; Polyethylene is synthetic, so b is wrong;

c The main component of quartz is silica, which is a mineral resource with very stable physical and chemical properties, which occurs naturally, so C is wrong;

d Polyester is one of the three major synthesis; The main ingredient of laundry detergent is sodium dodecylbenzene sulfonate, artificially synthesized with surfactant and detergent; Aspirin, also known as acetylsalicylic acid, has antipyretic and analgesic effects, and is often used for colds, colds, headaches, neuralgia and rheumatic arthralgia, which can be prepared by the reaction of o-bromobenzoic acid and acetic acid, and can also be synthesized by salicylic acid () and acetic acid directly through esterification reaction, so polyester, laundry detergent, and aspirin are all obtained by chemical synthesis, so d is correct;

Therefore, choose D

First, the invention of oil refining technology has provided convenient energy power for mankind. Second, the invention of polymer materials has laid the foundation for new materials for mankind. Third, the discovery of DNA structure.