Search results
Results from the WOW.Com Content Network
Fresh water is the water resource that is of the most and immediate use to humans. Fresh water is not always potable water, that is, water safe to drink by humans. Much of the earth's fresh water (on the surface and groundwater) is to a substantial degree unsuitable for human consumption without treatment.
The planet's fresh water is also very unevenly distributed. Although in warm periods such as the Mesozoic and Paleogene when there were no glaciers anywhere on the planet all fresh water was found in rivers and streams, today most fresh water exists in the form of ice, snow, groundwater and soil moisture, with only 0.3% in liquid form on the ...
Freshwater ecosystems are a subset of Earth's aquatic ecosystems. They include lakes , ponds , rivers , streams , springs , bogs , and wetlands . [ 1 ] They can be contrasted with marine ecosystems , which have a larger salt content.
Water resources are natural resources of water that are potentially useful for humans, for example as a source of drinking water supply or irrigation water. These resources can be either freshwater from natural sources, or water produced artificially from other sources, such as from reclaimed water or desalinated water (). 97% of the water on Earth is salt water and only three percent is fresh ...
Global map of countries by total renewable internal freshwater resources (billion cubic meters) in 2020, according to World Bank [1]. This is the list of countries by total renewable water resources for the year 2020, based on the latest data available in January 2024, by World Bank and Food and Agriculture Organization (AQUASTAT data). [2]
With almost 200 described species, including more than 160 endemics, the center of diversity for aquatic freshwater oligochaetes is Lake Baikal. [69] A smaller number of other freshwater annelids is known: 30 species of leeches (Hirudinea), [70] and 4 polychaetes. [69]
Lake Superior is the largest freshwater lake in the world by surface area [a] and the third-largest freshwater lake by volume, holding 10% of the world's surface fresh water. [12] Located in central North America, it is the northernmost and westernmost of the Great Lakes of North America, straddling the Canada–United States border with the ...
Lake Drummond is a freshwater lake at the center of the Great Dismal Swamp, a marshy region on the Coastal Plain of southeastern Virginia and northeastern North Carolina between Norfolk, Virginia, and Elizabeth City, North Carolina, in the United States.