Three parts of land and seven parts of the sea may become a thing of the past, why do experts say

"Three parts of the land and seven parts of the ocean" may become a thing of the past, the reason why experts say this is mainly due to two reasons, one is due to climate warmingThe global water level is gradually rising, and many low-altitude landmasses and small islands are in danger of being inundated; The second is the erosion of land soil by river waterIn China's Yellow River, for example, soil erosion occurs every year, and the water of the Yellow River carries a lot of soil into the ocean, causing much of the soil on land to sink to the bottom of the sea. <>

With the advancement of science and technology, although human beings can reclaim land through scientific and technological means, this method is not only time-consuming and laborious, but it seems that the speed of human land creation cannot keep up with the speed of land disappearance. To make matters worse, erosion and rising water levels are eroding human settlements. According to foreign ** reports, at the end of September last year, the small island in the northern part of Hokkaido, Japan, completely disappeared from the face of the earth.

In addition to the greenhouse effect that has led to rising levels, external forces are also a major culprit, most notably on China's Loess Plateau, where the Yellow River continues to erode the ground and bring large amounts of loess directly into the sea. <>

There is no doubt that humanity is more likely to be in crisis than people think, but that does not mean that humanity can only sit idly by. Humanity should do everything possible to control the greenhouse effect, avoid melting glaciers in the north and south poles, and control sea level rise. Millions of tonnes of ice melted in Greenland last year, causing damage to some nearby low-altitude areas.

Fortunately, countries around the world are aware of the problem and convene a global climate conference in Paris every year to reach an agreement to jointly curb the greenhouse effect, which has so far achieved good results. <>

It can also be seen from the results that the response actions taken by human beings are still useful, although they cannot completely solve these problems, but at least there is hope, and human beings should always understand that the only thing that nature can give human beings is peaceful coexistenceIf human beings want to plunder the earth's resources endlessly, it is only human beings themselves who will be hurt in the end.

Because the earth's greenhouse effect has caused the sea level to rise, the land area is decreasing, and it is no longer the ratio of 37 in the past.

Because with global warming, many oceans are gradually disappearing, glaciers are melting, oceans are gradually becoming land, and water is scarce, and our planet may have more land than oceans in the future.

In the absence of human destruction, most of the earth is oceans, but due to human overexploitation, the oceans have become less and less occupied.

As the planet warms, Antarctic glaciers begin to melt due to temperatures, causing sea levels to rise and land areas to shrink naturally. Antarctic glaciers account for 72% of the world's freshwater volume, and it is urgent to avoid the greenhouse effect.

What the experts mean is that the land area is gradually decreasing due to global warming, melting glaciers, rising water levels, and shrinking land area.

Summary. German scientist Wegener's "three parts of land, seven parts of the ocean" sea and land distribution of continental drift content: the continent is constantly drifting "Asia, Africa, North and South America, Antarctica and European oceans".

German scientist Wegener's "three parts of land, seven parts of the ocean" sea and land distribution of continental drift content: the continent is constantly drifting "Asia, Africa, North and South America, Antarctica and European oceans".

You've done a great job! Can you elaborate on that?

There are two main reasons why experts say this: first, due to climate warming, the global water level is gradually rising, and many low-altitude lands and small islands are facing the danger of being inundated by seawater; The second is the erosion of terrestrial soil by river water, taking the Yellow River in China as an example, the Yellow River basin has a lot of soil erosion every year, and the Yellow River water carries a large amount of soil into the ocean, causing a lot of soil on land to sink to the bottom of the sea.

Summary. Hello dear, this statement is inaccurate, in fact, about 71% of the Earth's surface is oceans and 29% is land. The so-called "seven-point land" and "three-point ocean" mean that if the land and ocean on the earth's surface are placed on a plane according to their distribution ratio on the earth's surface, then seventy percent of the plan will be land and three percent ocean.

In fact, about 71% of the Earth's surface is oceans and 29% is land. The so-called "seven-point land" and "three-point ocean" mean that if the land and sea on the earth's surface are placed on a plane according to their distribution ratio on the earth's surface, then seventy percent of the plan will be land and three percent of the ocean.

Hello dear, this floor plan is only a metaphor and a simplification, and does not reflect the actual distribution ratio of the earth's land and sea. In fact, the distribution of land and sea is very complex, and there are many complex geomorphological topography between the sea and land. At the same time, as the land and sea on the earth's surface are constantly moving and changing, this proportion will also change with the changes of time and space.

According to people's calculations, 71% of the earth's surface is ocean, and only 29% of the land area is land

So the answer is:

According to people's calculations, the area of the earth's Shanghai Zhengzuo vertical ocean accounts for 71%, the land area is 29%, and the surface of the earth is three parts of land and seven parts of the ocean

So the answer is:

Analysis: The earth we live on is a beautiful blue planet from space, and it looks more like a "water ball" According to people's calculations, 71% of the earth's surface is oceans, while only 29% of the land area In a nutshell, seven parts of the earth are oceans and three thirds are land According to people's calculations, 71% of the earth's surface is oceans, while only 29% of the land area In a nutshell, seven parts of the earth are oceans and three parts are land So choose: c Comments:

Observe the distribution of land and sea on the globe, and answer and memorize according to the knowledge in the textbook

As the global climate warms, glaciers and permafrost melt and sea levels begin to rise, changing the surface of the sea and the size of the land.

And it didn't become history. The current Earth's tectonic plates are still in a 7:3 ratio and have not changed much.

I think so, because many places have already been reclaimed from the sea, and it will definitely not be so clear-cut.

From space, the earth is more like a "water ball", because most of the earth's surface is ocean, and the world's sea and land are very unevenly distributed, with the ocean accounting for 71% of the branches and the limb land accounting for 29% of the land Generally speaking, "seven parts of the ocean, three parts of the land".

Therefore, b