Write a composition with the future society.

The ocean is the source of life and an indispensable part of people's lives. Now, people know more about the ocean, and they are also developing and using it more and more. So, what about the future ocean? In my mind, the future ocean world is like this: due to the explosion of the global population, the land is not enough for people to live in. Therefore, people turned their attention to the ocean and built cities in it. In a marine city, people travel freely in the ocean by a new type of high-tech machine, which is called "Passepartout". Passepartout looks like a submarine, and its streamlined appearance allows it to shuttle freely in the sea. "Passepartout" has an automatic seawater purification system, which can not only make the seriously polluted seawater clear for direct drinking, but also filter fresh air from the seawater for the people on board to breathe. This machine is driven by seawater, so it won't cause any pollution to the ocean. This submarine is powerful. He can not only walk freely in the sea, but also drive at high speed at sea and even walk freely on land. In this way, cars, ships and submarines are replaced, which greatly saves space. In marine cities, people live in the "Crystal Palace"-"SJG" made of special materials. The "Crystal Palace" is so big that fifty people will not feel crowded when they live together. Because it is made of special materials, it is comfortable to live in it, which is warm in winter and cool in summer. And because this material is transparent, you can watch TV while lying in bed, enjoying colorful fish and colorful corals in the past, which is very comfortable! By the way, Ocean City also has a garbage treatment plant, which can decompose and recycle garbage into various decorations. In a word, in marine cities, there are all kinds of living facilities, even more complete than those on land. In a marine city, people will live more happily and comfortably than on land. However, if you want to make this a reality, you can't just think about it. We must cherish and protect the ocean. Only in this way can we live in peace with the ocean. Comment: No matter how attractive the future marine cities are, I think marine life is absolutely unwilling to be rounded up by us. Why can't we humans design a bright future for birds, fish and insects? Offshore oil and gas development

Oil and natural gas resources According to the estimation of 1995, the world's proven offshore oil resources reserves are 37.9 billion tons and natural gas reserves are 39 trillion cubic meters. According to incomplete statistics, submarine oil and gas resources account for about 1/3 of global oil and gas reserves. It is predicted that in this century, submarine oil and gas development will extend from the shallow continental shelf to the sea area with water depth of 1000 meters.

Most offshore oil in the world exists on the continental shelf. According to estimates, the area of the world continental shelf is about 30 million square kilometers, accounting for 8% of the world's ocean area. With regard to the reserves of offshore oil, due to the limitation of exploration data and calculation methods, the conclusions are not the same. An estimate by the French Petroleum Research Institute is that the limited reserves of global oil resources are 654.38+0 trillion tons, and the recoverable reserves are 300 billion tons. Among them, offshore oil reserves account for about 45%, and recoverable reserves13.5 billion tons.