Energy & Green Tech
In the tropics, the deep sea is cold and the sea surface is very warm. That temperature difference can be harnessed and turned into electricity. If we can improve the technology, this method of producing power could be a ...
May 31, 2022
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Energy & Green Tech
As the pressures of climate change begin to bite particularly hard in the developing world and in regions on the margins of extreme environments, water security is becoming increasingly difficult for many people. A review ...
May 30, 2022
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Engineering
Rice University chemists working with researchers at the Ford Motor Company are turning plastic parts from "end-of-life" vehicles into graphene via the university's flash Joule heating process.
May 26, 2022
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437
Engineering
From large-scale submarines to solo divers, safe passage through shallow waters represents a common navigational challenge. But recently, researchers from Japan have achieved centimeter-scale accuracy in the acoustic positioning ...
May 26, 2022
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Energy & Green Tech
A new energy-efficient way to produce hydrogen gas from ethanol and water has the potential to make clean hydrogen fuel a more viable alternative for gasoline to power cars.
May 23, 2022
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Electronics & Semiconductors
Scientists from the Institute of Scientific and Industrial Research (SANKEN) at Osaka University, in collaboration with Chuo University, Eindhoven University of Technology, and National Institute of Advanced Industrial Science ...
May 23, 2022
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Electronics & Semiconductors
Water is the secret ingredient in a simple way to create key components for solar cells, X-ray detectors and other optoelectronics devices.
May 19, 2022
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74
Energy & Green Tech
Japan's nuclear regulator on Wednesday approved plans by the operator of the wrecked Fukushima nuclear plant to release its treated radioactive wastewater into the sea next year, saying the outlined methods are safe and risks ...
May 18, 2022
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Energy & Green Tech
Dozens of environmental and anti-nuclear organizations expressed opposition Tuesday to any attempt to extend the life of California's last operating nuclear power plant, challenging suggestions that its electricity is needed ...
May 17, 2022
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Energy & Green Tech
The water in Lake Powell, one of the nation's largest reservoirs, has fallen so low amid the Western drought that federal officials are resorting to emergency measures to avoid shutting down hydroelectric power at the Glen ...
May 17, 2022
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Water is a ubiquitous chemical substance, composed of hydrogen and oxygen, that is essential for the survival of many known forms of life. In typical usage, water refers only to its liquid form or state, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam. Water covers 71% of the Earth's surface. On Earth, it is found mostly in oceans and other large water bodies, with 1.6% of water below ground in aquifers and 0.001% in the air as vapor, clouds (formed of solid and liquid water particles suspended in air), and precipitation. Saltwater oceans hold 97% of surface water, glaciers and polar ice caps 2.4%, and other land surface water such as rivers, lakes and ponds 0.6%. A very small amount of the Earth's water is contained within biological bodies and manufactured products. Other water is trapped in ice caps, glaciers, aquifers, or in lakes, sometimes providing fresh water for life on land.
Water moves continually through a cycle of evaporation or transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Winds carry water vapor over land at the same rate as runoff into the sea. Over land, evaporation and transpiration contribute to the precipitation over land.
Clean, fresh drinking water is essential to human and other lifeforms. Access to safe drinking water has improved steadily and substantially over the last decades in almost every part of the world. There is a clear correlation between access to safe water and GDP per capita. However, some observers have estimated that by 2025 more than half of the world population will be facing water-based vulnerability. Water plays an important role in the world economy, as it functions as a solvent for a wide variety of chemical substances and facilitates industrial cooling and transportation. Approximately 70 percent of freshwater is consumed by agriculture.
This text uses material from Wikipedia, licensed under CC BY-SA
