Energy & Green Tech

How a new heat battery can quickly make millions of homes gas-free

The need to take homes off gas has increased ever since the conflict in Ukraine. A heat battery with salt and water as simple components could provide a quick and large-scale solution for over three million households in ...

Energy & Green Tech

Why can't we get our drinking water from the ocean?

For centuries, people have been trying to divine freshwater from the ocean. Ships in the 16th century carried small distilleries that could be used in the event of an emergency to boil seawater. But trying to do this on a ...

Business

Instacart CEO says online grocery shopping has room to grow

When the pandemic hit the U.S. last year, grocery delivery company Instacart suddenly became a lifeline for millions of consumers. Sales volumes skyrocketed; in one month, the company added 300,000 drivers to keep up with ...

Energy & Green Tech

Strong sunlight powers passive cooling device

A simple cooling system driven by the capture of passive solar energy could provide low-cost food refrigeration and living space cooling for impoverished communities with no access to the electricity grid. The system, which ...

Energy & Green Tech

Removing the lead hazard from perovskite solar cells

Although they offer a very promising solution for capturing solar energy, perovskite solar cells contain lead, which is toxic to the environment and a serious health hazard. EPFL scientists have now found a very elegant and ...

Automotive

Sick of dangerous city traffic? Remove left turns

To reduce travel times, fuel consumption and carbon emissions, in 2004, UPS changed delivery routes to minimize the left-hand turns drivers made. Although this seems like a rather modest change, the results are anything but: ...

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Salt

Salt is a dietary mineral composed primarily of sodium chloride that is essential for animal life, but toxic to most land plants. Salt flavor is one of the basic tastes, an important preservative and a popular food seasoning.

Salt for human consumption is produced in different forms: unrefined salt (such as sea salt), refined salt (table salt), and iodized salt. It is a crystalline solid, white, pale pink or light gray in color, normally obtained from sea water or rock deposits. Edible rock salts may be slightly grayish in color because of this mineral content.

Chloride and sodium ions, the two major components of salt, are necessary for the survival of all known living creatures, including humans. Salt is involved in regulating the water content (fluid balance) of the body. Salt cravings may be caused by trace mineral deficiencies as well as by a deficiency of sodium chloride itself. Conversely, overconsumption of salt increases the risk of health problems, including high blood pressure.

This text uses material from Wikipedia, licensed under CC BY-SA