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... pipe to the cystern instead, and gravity feed is all that is required to flush the loo for more than six months of each year. No special valves are needed to protect the city's water from contaminated ...
The average household emits around 14 tonnes of greenhouse gases every year, half of which is from electricity generation. This is a large contributor to climate change and global warming. One simple ...
... make smart plant selections. Couple this with water saving technologies and you can then enjoy a great garden all year round. Below are some general water saving tips for the garden; Use plants that are ...
... about five minutes Fix leaky taps and hoses as soon as you find them. One drip every two seconds adds up to over 6 litres a day or 2,315 litres every year Install a low-flow showerhead(s). Modern low-flow ...
... too much equator-facing glass can result in excessive winter, spring, or fall day heating, uncomfortably-bright living spaces at certain times of the year, and excessive heat transfer on winter nights ...
... the sun at solar noon will oscillate from north to south and back again during the year. In regions closer than 23.5 degrees from either north-or-south pole, during summer the sun will trace a complete ...
... may be considered "dark grey" or blackwater.   In recent years concerns over dwindling reserves of groundwater and overloaded or costly sewage treatment plants has generated much interest in the reuse ...
... space, wildlife habitat, and wetlands are developed each year. As of 2006, buildings used 40 percent of the total energy consumed in both the US and European Union. In the US, 54 percent of that percentage ...
... for several decades if the active tank volume is at least three times the yearly addition. This is because the waste dramatically decreases in volume: after around 5 years only 1-2% of the original volume ...
Sustainability, in a general sense, is the capacity to maintain a certain process or state indefinitely. In recent years the concept has been applied more specifically to living organisms and systems. ...
... expands. The expanding air flows toward the central tower, where a turbine converts the air flow into electricity. A 50 kW prototype was constructed in Ciudad Real, Spain and operated for eight years before ...
... 4.5–6%. The earliest significant application of solar cells was as a back-up power source to the Vanguard I satellite, which allowed it to continue transmitting for over a year after its chemical battery ...
... of transpired collectors (3 to 12 years) makes them a more cost-effective alternative than glazed collection systems. As of 2003, over 80 systems with a combined collector area of 35,000 m² had been installed ...
... in 1872 in the Chilean mining town of Las Salinas. The plant, which had solar collection area of 4,700 m², could produce up to 22,700 L per day and operated for 40 years. Individual still designs include ...
... chicks and drying chicken manure. Greenhouses convert solar light to heat, enabling year-round production and the growth (in enclosed environments) of specialty crops and other plants not naturally suited ...
... of renewable energy on Earth. The total solar energy absorbed by Earth''s atmosphere, oceans and land masses is approximately 3,850 zettajoules (ZJ) per year. In 2002, this was more energy in one hour ...
... discussed for years, since the 1973 oil crisis brought energy issues to the forefront. In the late 1970s, physicist Amory Lovins popularized the notion of a "soft path" on energy, with a strong focus on ...
... to the atmosphere. As a bonus, the technology can have a payback period of less than a year depending on use factors.  ...
... five years the batteries may begin to leak their contents which contains mercury posing a serious health risk. The mercury will begin to corrode the inner shell of the battery. In most jurisdictions there ...
... Wash., has calculated that if Americans keep generating garbage at current rates for 1,000 years, and if all their garbage is put in a landfill 100 yards deep, by the year 3000 this national garbage heap ...
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Taxonomy by Zaragoza Online