In fact, it is not difficult to live a wonderful life: you choose a recognized world problem, preferably a mathematical problem using only a piece of paper and a pencil, such as the Goldbach conjecture or the Fermat theorem, or Pure natural philosophical problems that even paper and pen are not necessary, such as the origin of the universe, devote all their energy to physical and mental research, and only ask about cultivation and gain, and unknowingly focus on it, a lifetime will pass. People often say that it is the same thing. Or on the contrary, making money as the only goal, all the time thinking about how to earn, without asking what to earn, when he died, holding a pile of gold coins like Glan Tai said: Ah, it’s warm … So the key to a wonderful life is what you can get hooked on.
The Amazon forest fire has attracted worldwide attention. Many media said that it was the earth’s lungs that were lit. Even French President Macron said on his personal social media that Amazon provided 20% of the oxygen to the earth. The famous American meteorologist Professor Scott Denning wrote on the Livescience website that this statement is incorrect. The oxygen we breathe does not come from the forest, but from the ocean.
To understand this, we must first realize that all elements on the earth have been constantly circulating between land, ocean and atmosphere, and oxygen atoms are no exception. Oxygen must have originated from photosynthesis in plants, which is beyond doubt. One third of terrestrial photosynthesis occurs in tropical rain forests, and Amazon is the largest tropical rain forest on the planet, so Amazon does produce a lot of oxygen every year. However, the stubble leaves left after the plant’s death will be quickly decomposed by microorganisms, and the decomposition process will consume the same amount of oxygen. Therefore, most of the oxygen produced by photosynthesis on land will be consumed in the end. The contribution value is almost zero.
In this case, how can we make a surplus of oxygen?
The answer is to remove the organics from photosynthesis from the oxygen cycle and prevent them from being decomposed. One place on earth offers this possibility, and that is the deep ocean. There are a lot of seaweeds on the surface of the ocean. They produce a lot of organic matter through photosynthesis, most of which are eaten by fish, but a small part of the uneaten organic matter sinks into the ocean floor, where there is a severe lack of oxygen and microorganisms cannot survive. So the organics are preserved, avoiding the oxygen cycle.
The oxygen we breathe is the result of a large amount of organic matter being removed from the oxygen cycle. Organic matter is usually represented by carbon. The organic matter removed from the oxygen cycle is the carbon sink (Carbon Sink), which is well-known to everyone, which is much higher than the total amount of organic matter existing in the body. According to Professor Denning’s estimation, even if all living things on the earth were burned by a fire, the oxygen content in the atmosphere would be reduced by only 1%. In other words, no matter how many forest fires erupt, the oxygen on the earth will be enough for us to breathe for millions more years.
Of course, this is not to say that the Amazon fire was irrelevant. Not to mention anything else, the tropical rain forest is the place with the highest biodiversity on the planet. A large number of species live here only. A fire is likely to exterminate many species that have not been discovered by humans. The damage caused cannot be measured by money. of.
The next question is, where did the organic matter that sank on the ocean floor finally go? The answer is oil and gas. When we develop fossil energy, we essentially reintroduce the carbon sinks accumulated over the past several tens of millions of years into the oxygen cycle. The resulting reduction in oxygen is not the biggest problem, but a by-product of reduced oxygen, carbon dioxide. This is a very strong greenhouse gas, and its concentration largely determines the surface temperature of the earth. This is how global warming comes about.
One more thing worth mentioning is that there is an environment similar to the deep sea on land, this is the peat bog. This thing is usually located in the cold zone, and the litter is submerged by the anoxic river water, before it is broken down by microorganisms, it sinks to the bottom and is stored there. Arctic permafrost is full of such peat bogs, which contain large carbon sinks. The Arctic region is also burning this summer. The impact of this incident on climate change is far greater than that of the Maasian fire, but it has been ignored by the public.