Is global warming only part of the climate cycle, or is it a disaster caused by human activities?

There is still much controversy about "global warming", and scientists have not reached a consensus. The premise is not established, so it is impossible to say whether it is human activities or natural reasons.

On a large time scale, the climate of the earth is changing, and the temperature is much higher when it is warm. Let's look at the Millennium scale again: during the Shang and Zhou Dynasties, there were evergreen rainforests and elephants in Henan, and now the climate is much warmer. It used to be so cold in Qing Dynasty that the Pearl River in Guangdong was frozen.

If you go to a larger time scale, millions or even billions of years, when you relax, there used to be forests and mammals in Antarctica. When it is cold, the earth almost becomes a big snowball, and glaciers cover the mid-latitude areas.

Before the appearance of human beings, the earth experienced many cold and hot climate changes.

At present, the scale of what we call "global warming" is several decades to one hundred years. Many scientists question that the more conservative term is "global climate change"-this kind of warming is not the same thing, and the change may be the frequency of extreme weather (extremely cold, extremely hot, extremely dry, heavy waterlogging, etc.). ) increase.

Generally speaking, global climate change may not be man-made, except for local manifestations in some areas. For example, the famous El Nino phenomenon, the weakening of Peru's cold ocean current has led to a series of changes, which have not been found to be related to human activities.

Climate change is very complicated, and human beings don't know much about it, and there are not many people who can intervene. But maintaining the local environment is definitely good for our own health. Advanced humans have adopted many methods, such as guiding some scientists to discover and reveal some laws of celestial bodies in the universe through their efforts; Others aim at the general public and educate people to know the universe, adapt to nature, develop peacefully and harmoniously through different national cultures, customs and habits. Let people know the existence of a law of natural phenomena in the universe and realize the development law of climate. Today, the earth has suffered great damage, such as soil erosion, desert increase, dry climate, air pollution, environmental damage and ecological imbalance, which is too difficult to recover. Humans on our planet study human beings, cosmic science and natural science, not other sciences. We must better protect nature while understanding, utilizing and transforming it.