空 the origin of gas.

The best answer: The free oxygen released by plants during photosynthesis oxidizes carbon monoxide in the original atmosphere into carbon dioxide, methane into water vapor and carbon dioxide, and ammonia into water vapor and nitrogen. Later, due to the continuous photosynthesis of plants, most of the carbon dioxide in 空 gas was absorbed in the process of photosynthesis of plants, which made the oxygen in 空 gas more and more, and finally formed a modern 空 gas mainly composed of nitrogen and oxygen.

Before the appearance of primitive green plants, the primitive atmosphere was dominated by carbon monoxide, carbon dioxide, methane and ammonia. After the emergence of green plants, the free oxygen released by plants during photosynthesis makes carbon monoxide in the original atmosphere oxidized into carbon dioxide, methane oxidized into water vapor and carbon dioxide, and ammonia oxidized into water vapor and nitrogen. Later, due to the continuous photosynthesis of plants, most of the carbon dioxide in 空 gas was absorbed in the process of photosynthesis of plants, which made the oxygen in 空 gas more and more, and finally formed a modern 空 gas mainly composed of nitrogen and oxygen.

At normal temperature, 空 gas is colorless and tasteless, while liquid 空 gas is a light yellow liquid which is easy to flow. Generally, when the 空 gas is liquefied, the carbon dioxide has been removed, so the composition of the liquid 空 gas is 20.95% oxygen, 78.12% nitrogen and 0.93% argon, and the content of other components is very small, which can be omitted.

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