Where is the cleanest air and the last piece of pure land in the world?

The latest news is that around Antarctica, there is the cleanest air in the world over the Antarctic Ocean, which is called the real primitive land. The Antarctic Ocean is one of the few places on earth that is least affected by human activities. Human activities affect almost every region of the earth, and even our garbage can be found in the most remote oceans. On uninhabited remote beaches, waste plastics are washed away by seawater again and again, and the clouds above us also contain a lot of chemicals.

In the study of the air in the Southern Ocean, the researchers found that the clouds without any signs of human activities were very clean, and no fossil fuels, fertilizers or human feces were used. This layer of air from the ground to 10 ~ 12 km is the bottom of the atmosphere and is called the troposphere. Major weather phenomena, such as clouds, rain, snow and hail, all occur on this floor. Above the troposphere, up to about 50 kilometers high, it is called the stratosphere.

The air in the stratosphere is much thinner than that in the troposphere, which contains little water vapor and dust, so there is almost no weather phenomenon. From the upper stratosphere to the 80 km layer, some people call it the middle layer, and the temperature of this layer decreases with height. The space above 80 km to 500 km is called the thermosphere. The temperature on this floor is very high, and the temperature difference between day and night is very large. From about 50 km feet above the ground to about 1000 km feet high, it is called the ionosphere.

Beautiful auroras appear in the ionosphere. In the air, they are wrapped outside the earth, and the thickness of our fresh air actually reaches thousands of kilometers. This thick layer of air is called the atmosphere, which is divided into troposphere, stratosphere, mesosphere, ion layer, warm layer and free layer. We live in the lower troposphere. In the stratosphere, the air is much thinner. Here is a gas called ozone oxygen pure contraction isomer O3, which can absorb harmful ultraviolet rays in sunlight.