Seven things to open the door: rice, oil, salt, sauce, vinegar and tea. These seven daily necessities are the necessities of people's lives, and the "firewood" at the head of these necessities is one of the "killers" of carbon emissions.

Because the ape-man inadvertently found that the food that had been struck by lightning tasted better, the ancestors repeatedly tried to invent the method of drilling wood for fire and learned to barbecue food with fire. The wood used to make a fire is the fuel that people later used to cook and make a fire. Today, many people still use firewood to cook and make fires, but with the gradual understanding of carbon, people are more and more aware that the smoke produced by firewood contains many harmful gases, such as carbon monoxide, carbon dioxide, chlorofluorocarbons and so on. These harmful gases are chemically stable and will not decompose in the lower atmosphere after escaping into the atmosphere. After rising to the stratosphere, under the irradiation of ultraviolet rays, a chlorine atom will be generated, which will decompose ozone into oxygen and generate new chlorine atoms in the reaction, which can continue to react with ozone and destroy the ozone layer. Now there is a huge hole in the ozone layer over the Arctic, which is caused by these harmful gases. After the ozone layer is destroyed, the ultraviolet rays and infrared rays in the sun are more wantonly emitted to the earth, which makes the global temperature warm. Decades later, the island countries of Marshall and China, which were built on coral reefs, were unable to gather coral reefs and sink into the Pacific Ocean due to the influence of global warming. Not to mention the pollution in the sky, it also does great damage to the environment on the ground. The firewood we used was cut into strips by big trees on the ground to burn the fire. These cut big trees reduced the vegetation area. Excessive logging will cause soil erosion and natural disasters, such as floods, droughts and mudslides, with disastrous consequences.

People found the disadvantage of using wood to make fire, so they went to look for better fuel. When people discovered oil, they also discovered the main gas fuel-natural gas. It decomposes some animal and plant debris buried in the shallow underground into organic matter through microorganisms. With the increase of formation depth, temperature and pressure, the deposited organic matter can undergo chemical reaction, so that the organic matter can be gradually decomposed to produce hydrocarbons, which are generally formed at the temperature of 75 ~ 200 degrees Celsius for millions of years. Another is to evaporate from oil at high temperature and become natural gas. So now people often cook with natural gas. Natural gas has many advantages: it contains no carbon monoxide and is lighter than air. Once it leaks, it will immediately spread upward, and it is not easy to accumulate and form explosive gas, which is safe; It also reduces the consumption of coal and oil, can reduce the exploitation of oil and reduce the harm to the environment and land. Natural gas can also be used as a clean energy source, which can reduce the emissions of sulfur dioxide and dust by nearly 100%, carbon dioxide by 60% and nitrogen oxides by 50%, which is helpful to reduce the formation of acid rain, alleviate the global greenhouse effect and fundamentally improve the environmental quality. It is a good gas for environmental protection.

But these are not enough. I think we should use solar energy and nuclear energy as fuel in the future. Because solar energy is endless, if we use solar energy as fuel, we can not only protect the environment, but also produce no harmful gas. It can also make people feel at ease and safe without worrying about air leakage. Using nuclear energy is also a good choice, because the energy generated by nuclear energy is very huge. If nuclear energy is successfully used as fuel to produce nuclear fusion, the generated energy can be used by all mankind for billions of years. It sounds like a beautiful myth, but I believe it will come true. At that time, the sky should be bluer, clouds will float farther, the earth will become surrounded by green water and green hills will stand tall.

No matter what kind of "firewood" people will use in the future, I believe that as long as we have this concept of low-carbon life, we will certainly create a low-carbon miracle!