A todos nos gusta estar cómodos en nuestros hogares y negocios. Utilizamos aire acondicionado para tener una temperatura agradable en el interior. Los aires acondicionados funcionan básicamente moviendo el aire caliente del interior al exterior. ¿Esto tendrá un impacto en el clima? ¿En el calentamiento global?
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Scientists have discovered that the rapid spread of hybridization between a native species and an invasive species of trout in the wild is strongly linked to changes in climate.
In the study, stream temperature warming over the past several decades and decreases in spring flow over the same time period contributed to the spread of hybridization between native westslope cutthroat trout and introduced rainbow trout – the world's most widely introduced invasive fish species –across the Flathead River system in Montana and British Columbia, Canada.
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The world's first community-owned tidal power turbine has started exporting electricity to the local grid, the Scottish Government has announced.
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We all love to be comfortable in our homes and businesses. We use air-conditioning to provide comfortable temperatures indoors. Air conditioners work basically by moving hotter air from inside to outside. Does this have an impact on climate? Global warming?
A team of researchers from Arizona State University has found that releasing excess heat from air conditioners running during the night resulted in higher outside temperatures, worsening the urban heat island effect and increasing cooling demands.
"We found that waste heat from air conditioning systems was maximum during the day but the mean effect was negligible near the surface. However, during the night, heat emitted from air conditioning systems increased the mean air temperature by more than 1 degree Celsius (almost 2 degrees Fahrenheit) for some urban locations," said Francisco Salamanca, a post-doctoral research scientist at Arizona State University's School of Mathematical and Statistical Sciences.
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Un experto mundial en paneles solares describirá hoy cómo su trabajo pionero en energÃa solar mejorará significativamente el rendimiento de los paneles solares, además de contribuir de forma simultánea a reducir su costo a la mitad. La tecnologÃa se comercializará en los próximos cinco años.
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Commercial buildings use large amounts of electricity and natural gas. Significant reductions in energy use can be achieved by installing new modern systems but this requires a significant capital cost, It is possible to install modern control systems at much lower cost and these can also significantly reduce energy use, and improve comfort at the same time! A new study by the Pacific Northwest National Laboratory shows that commercial buildings could cut their heating and cooling electricity use by an average of 57 percent with advanced energy-efficiency controls, according to a year-long trial of the controls at malls, grocery stores and other buildings across the country. The study demonstrated higher energy savings than what was predicted in earlier computer simulations by the same researchers.
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