Los congeladores que se están probando en Central Park operan sin electricidad. Los vendedores incluso pueden cargar sus propios dispositivos móviles conectándolos a tomas conectadas a las unidades congelantes. Parece adecuado que Unilever, el mayor productor mundial de helados, esté lanzando los primeros congeladores solares del mundo en Central Park para...
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El cambio climático ha hecho que nos cuestionamos las cosas que hacemos, desde la compra de alimentos hasta el uso de energía para montar aviones y vehículos de conducción. Una de las preguntas más frecuentes en torno al cambio climático es: ¿Qué tipo de combustible es más ecológico, gasolina o diesel? El sentido común nos haría responder "diesel" de inmediato, ya que los motores que funcionan con diesel emiten menos dióxido de carbono (CO2), y menos CO2 es mejor para disminuir la cantidad de gases de efecto invernadero en la atmósfera. Sin embargo, ser respetuoso del medio ambiente no es tan simple como emitir menos CO2. Los vehículos a diesel pueden emitir un 20% menos de CO2 por kilómetro recorrido, pero pueden ser más perjudiciales en cuanto a la contaminación local, debido a las pequeñas partículas que se liberan en la atmósfera. La pregunta en realidad no es cuál combustible o tipo de motor es más ecológico, ya que...
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Astronomers have found signs of water ice clouds on an object just 7.3 light-years from Earth-less than twice the distance of Alpha Centauri, the nearest star system to the sun. If confirmed, the discovery is the first sighting of water clouds beyond our solar system. The clouds shroud a Jupiter-sized object known as a brown dwarf and should yield insight into the nature of cool giant planets orbiting other suns. Kevin Luhman, an astronomer at Pennsylvania State University, University Park, recently discovered the nearby object by using images from NASA’s WISE infrared space telescope, which scanned the sky from 2010 to 2011. A brown dwarf is a failed star and has so little mass that it can't sustain nuclear reactions, so after its birth it fades and cools. This brown dwarf, named WISE J0855-0714, is the coldest known. Its temperature is slightly below the freezing point of water, so it's colder than Earth's mean temperature but warmer than Jupiter’s.
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As Japan seeks to end reliance on nuclear power, one of the answers is floating 'solar islands', writes Jon Major. A 70MW solar island opened last year, and two additional plants have just been announced. Two companies in Japan recently announced they are to begin building two large solar power islands that will float on reservoirs.
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In a major win for sharks and their advocates, Australia’s Environmental Protection Agency (EPA) has recommended Western Australia (WA) end its controversial shark killing program. After a series of fatal attacks, WA's government proposed a new program in an effort to keep beachgoers safe that involved setting out baited drum lines, which consist of a large baited hook attached to a buoy and an anchor to hold it in place, in designated zones along popular beaches with the intention of killing great white sharks, bull sharks and tiger sharks who were larger than three meters.
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The WHO has released a new study ranking countries with the worst air pollution. When we consider air pollution most of us will automatically think of China. However, it was nowhere to be found in the top 10 offenders. This, by the way, is not because they’ve suddenly cleaned up their act, but rather because this study ranked countries as a whole, rather than cities. So here are the top 5 countries with the worst air pollution, and what they are trying to do to combat it. 1. Pakistan Pakistan made #1 on the list with a PM 2.5 pollution level of 101 ug/m3. Now, that might not make sense so let me break it down: PM 2.5 stands for the size of the particles of pollution. The size (2.5) is frequently cited as the most detrimental because it can travel deep into lungs and cause a variety of ailments. Good examples of these particles are smoke, mold and dust. The ug/m3 part stands for micrograms per unit meter of air. So Pakistan has 101 micrograms of PM 2.5 pollutants per unit meter of air.
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