Energy & Green Tech

Is it sensible to use rainwater to flush the toilet?

As a world first, a new residential district in Aarhus is using secondary water from the local water utility for toilets and washing machines. The solution is supported by a life cycle assessment.

Engineering

Using waste heat to power an environmentally sustainable future

In his most recent published research, appearing in Applied Thermal Engineering, City, University of London's Dr. Martin White explores a novel organic Rankine cycle system, based on a two-phase expansion through numerical ...

Energy & Green Tech

Sustainable electricity generation at low temperatures

Low-temperature heat in the form of waste heat from industry or geothermal power plants offers big potential for sustainable and need-tailored power supply. The Modular Low-temperature Cycle Karlsruhe (MoNiKa), the only research ...

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Cycling

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