Engineering
There's a patch of concrete on Drexel University's campus that could portend a frost-free future for sidewalks and highways in the Northeast.
Mar 18, 2024
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1012
Engineering
A widely-used gas that is currently produced from fossil fuels can instead be made by an 'artificial leaf' that uses only sunlight, carbon dioxide and water, and which could eventually be used to develop a sustainable liquid ...
Oct 21, 2019
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9249
Engineering
Researchers at UCL have solved a major piece of the puzzle that makes up the ancient Greek astronomical calculator known as the Antikythera Mechanism, a hand-powered mechanical device that was used to predict astronomical ...
Mar 12, 2021
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522
Energy & Green Tech
A team of researchers led by chemists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory has learned that an electrolyte additive allows stable high-voltage cycling of nickel-rich layered cathodes. Their ...
Jun 1, 2022
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1170
Energy & Green Tech
Perovskites, mineral materials composed of calcium titanate, have been found to be valuable for the fabrication of high-performance solar cells. While teams of scientists and engineers worldwide have been developing and testing ...
Energy & Green Tech
In years to come, sodium-ion batteries (NIBs) could potentially be a great alternative to current energy storage systems. Despite their advantages, including the abundance of sodium and a potentially long cycle life, these ...
Energy & Green Tech
Researchers have designed a fuel production system that uses water, carbon dioxide (CO2), and sunlight to produce aviation fuel. They have implemented the system in the field, and the design, publishing July 20 in the journal ...
Jul 20, 2022
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5399
Engineering
Often referred to as the "dream batteries," all-solid-state batteries are the next generation of batteries that many battery manufacturers are competing to bring to market. Unlike lithium-ion batteries, which use a liquid ...
Dec 4, 2023
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108
Energy & Green Tech
Humankind has entered uncharted territory: atmospheric CO2 levels have soared to a record-breaking 415 ppm for the first time in human history. The need to find a sustainable alternative to CO2-producing fuels is urgent. ...
Jun 10, 2019
0
1922
Engineering
Engineers at the University of California San Diego have developed lithium-ion batteries that perform well at freezing cold and scorching hot temperatures, while packing a lot of energy. The researchers accomplished this ...
Jul 4, 2022
2
71
Cycling, also called bicycling or biking, is the use of bicycles for transport, recreation, or for sport. Persons engaged in cycling are cyclists or bicyclists. Apart from ordinary two-wheeled bicycles, cycling also includes riding unicycles, tricycles, quadracycles, and other similar human-powered vehicles (HPVs).
Bicycles were introduced in the 19th century and now number about one billion worldwide. They are the principal means of transportation in many regions.
Cycling is a very efficient and effective mode of transportation optimal for short to moderate distances. Bicycles provide numerous benefits compared to motor vehicles, including exercise, an alternative to the use of fossil fuels, no air or noise pollution, much reduced traffic congestion, easier parking, greater maneuverability, and access to both roads and paths. The advantages are at less financial cost to the user as well as society (negligible damage to roads, and less pavement required). Criticisms and disadvantages of cycling include reduced protection in crashes, particularly with motor vehicles, longer travel time (except in densely populated areas), vulnerability to weather conditions, difficulty in transporting passengers, and the skill and fitness required.
This text uses material from Wikipedia, licensed under CC BY-SA
