The earth is getting greener? The satellite found that the Alps turned green, and scientists were worried about it.

The earth is really changing, not only the habitat of human beings, but also the north and south poles and alpine plateaus far away from human beings. Moreover, many changes are related to us to a considerable extent, and we humans need to be responsible for some changes in the earth. Because our human activities have caused these changes, or we have accelerated the pace of these changes.

A satellite image study spanning more than 30 years shows that great changes have taken place in the European Alps from 1984 to 20021year. In recent years, the melting speed of snow and ice in Alps has obviously accelerated, which is directly related to global warming. In addition, the Alps are still rapidly "turning green" and a large number of vegetation are growing.

Some friends may think it is a good thing and some friends think it is not good news about the greening of Alps. Some people think that this is a good thing, because we have planted trees over the years, making the earth greener, hoping that green plants can absorb carbon dioxide in the atmosphere to alleviate the trend of climate warming. Some people think that this is the cause of bad news, because these peaks themselves are white, and a series of problems will occur when they turn green.

Although we are planting trees, it is not good news that there are a large number of green plants in the North and South Poles or alpine plateau areas, which will aggravate the rise of the earth's temperature. Because snow can reflect a lot of sunlight back, the surface temperature will not be very high, and the snow and ice will not melt quickly. But when the snow turns green, or the land is directly exposed, it can't reflect sunlight efficiently, but absorbs a lot of heat. At this time, the ice and snow will melt faster. Gradually, the area of green is getting bigger and bigger, while the area of white snow is getting less and less. In other words, greener Alps may greatly increase the melting speed of snow and ice in Alps. Eventually, there will be less and less ice and snow in the Alps, and with less and less ice and snow, the area of green space will become larger and larger. This can be said to be a vicious circle problem. So some scientists are worried.

This is not the first time that the Alps have become discolored. Besides the problem of turning green, the Alps have turned red before. Researchers found some pink glaciers in the Alps, that is, the original white snow turned pink. Whether it turns green or pink, it will absorb a lot of heat and further accelerate the melting of ice and snow, so this is not good news and needs our attention.

Snow in the Alps turns pink because of an algae called anchorage nordenskioeldi. These algae will be dormant in cold weather, but when the temperature rises and the glaciers melt, these dormant algae will wake up, grow rapidly and grow pink spores. With the awakening of a large number of algae, the white snow turned pink. As the snow changes color and absorbs more heat, the melting speed will be accelerated, and eventually more and more algae will wake up, and the area of powder snow will become larger and larger. This is also a vicious circle problem.

Mount Qomolangma, the highest mountain on earth, has also been found to turn green. The scientific report published in Global Change Biology pointed out that when scientists analyzed the photos of Mount Everest taken by satellites, they found that many green plants, including grass and shrubs, grew on Mount Everest. According to the data, green vegetation has been found at the altitude of 6 159 meters on Mount Everest. During the period from 1993 to 20 18, the area of green vegetation on Mount Everest became larger and larger, and the coverage rate gradually increased. Scientists believe that there are more and more green plants on Mount Everest, which is the most intuitive manifestation of the accelerated melting of ice and snow, because it shows that there are more and more exposed land on Mount Everest.

The problems brought about by climate warming are not only the problems that glaciers in alpine plateaus and polar regions melt faster and turn green and red, but also many unexpected or unexpected problems. Many problems will eventually be "fed back" to ourselves, and we humans can't stay out of it. So, what should we do?

The earth is our only home. Protecting the earth's home is what we can do at present. If the environment of the earth's home deteriorates, we humans may not be able to survive on the earth. Over the years, we are really trying to protect the earth and alleviate the trend of climate warming, and afforestation, which we often say, is one of the measures. A sub-issue of Nature, Sustainable Development of Nature, once published such a study: during the period from 2000 to 20 17, the newly-added green vegetation area on the earth was almost equivalent to an Amazon rainforest, and the earth became greener, among which China contributed a lot and Indian contributed a lot. China and India contribute one third of the green vegetation to the earth.

Our efforts over the years are obvious to all the world. From the early days of the founding of New China to the present, we have spent several decades, and the forest coverage rate has increased from the initial 8.6% to 23.04%, and the forest area has increased from more than 80 million hectares to 220 million hectares. According to the plan, by 2025, our forest coverage will increase to 24. 1%.

In addition to protecting the earth, we also need to explore the universe and find some alien planets suitable for our living in the depths of the vast universe. Because the earth will not be livable forever, as the temperature and brightness of the sun rise, the earth will become hotter and hotter in the future. Scientists predict that after 654.38 billion years, the earth may no longer be livable. Therefore, our ultimate way out is to go to the sea of stars and emigrate to other planets.

At present, scientists have discovered more than 5,000 exoplanets and selected 24 "super livable" planets from the known exoplanets. These "super livable" planets have relatively good environmental conditions, suitable temperatures and a lot of oxygen in the atmosphere, which should be suitable for human habitation in theory. Some scientists believe that living on these "super livable" planets may be more comfortable than the earth. However, these "super livable" planets are too far away from our earth, and we will not be able to reach these "super livable" planets for a long time to come. Therefore, the urgent task now is to protect the earth, strive to develop science and technology while protecting the earth, and master the ability of interstellar flight and interstellar immigration as soon as possible.