Most of the water on Earth is distributed in:
Oceans: approximately 71% of the Earth's surface is covered by oceans, which are the largest bodies of water on Earth. The ocean contains most water resources, but most is salt water and cannot be directly used for drinking and agriculture.
Freshwater lakes: There are many freshwater lakes on earth, some of which are the largest freshwater lakes in the world, such as the Great Lakes of North America, the Lake Baikal in Russia and the lakes of the Great Rift Valley in East Africa. These lakes constitute an important source of fresh water resources.
Rivers: Rivers are important transportation channels for fresh water resources. They pass through different regions and provide humans with important uses such as drinking water, irrigation of agricultural land and electricity production. The flFamous rivers in the world include the Nile, the Amazon River, the Yellow River and the Yangtze River.
Groundwater: Groundwater reserves are significant. They are located in the groundwater layer and must generally be obtained by drilling wells. Groundwater is the primary source of drinking water in many regions and is also used for irrigation and industrial purposes.
Glacier and ice caps: Large amounts of fresh water are stored in glaciers and ice caps in polar regions and high mountain areas. Melting water in these regions has significant consequences on global sea levels and fresh water reserves.
Although the total amount of water resources on earth is large, their distribution is uneven and affected by factors such as climate, geography and geology. Some regions are facingwater shortages, while others may have abundant water sources. This unequal distribution leads to problems in the management and use of water resources on a global scale.
With the growth of the world's population and the development of industrialization, the demand for fresh water resources continues to increase, leading to water shortages in some regions. Sustainable management and protection of water resources therefore become crucial. This includes taking measures to reduce water waste, improve the efficiency of water resource use, protect the environment of water sources, and carry out international cooperation on water resources.
In short, water resources on earth constitute a valuable natural resource that is crucial for the survival and development of humanity. We must carefully manage and protect this resource to ensure that it can continuer to meet growing demand and maintain the ecological balance of the Earth and the sustainable development of humanity.
LZ asked three questions. Should the answer be divided into three parts or should it be answered in one part? Since this is a short answer, I'll briefly expand:
1) There is plenty of water on earth but very little fresh water available
This is determined by reality, that is, many water resources are currently impossible or difficult for humans to use. It is mainly divided into three parts: First, most of the water on earth is sea water, and ocean water accounts for. for 97% of the fresh water on earth, that part is not fresh water. second, even for fresh water resources on earth, the amount of fresh water stored in glaciers accounts for about 3/4 of the total fresh water on earth; , even pFor other fresh water resources, many fresh water resources in high mountains and canyon areas can only be used for power generation, etc.
2) What is water pollution?dye?
The chemical, physical, biological or radioactive properties of a body of water are modified due to the intervention of certain substances, thus affecting the efficient use of water, endangering the human health or damaging the ecological environment, causing the deterioration of water quality (different versions of the manual may have slightly different explanations).
3) How to save water?
This generally comes from two perspectives, namely energy savings and emissions reduction. The first is energy saving, that is, improving the level of production technology or living technology and reducing consumption.water intake; the second is reducing emissions, that is, improving the use of wastewater as much as possible and implementing clean production.
Here is the preliminary answer. I hope it answered your questions.