• “Green alternative to air conditioning”

    capa_ar_condicionado-696x393“On hot days it is impossible to give up a good air conditioning to withstand the high temperatures, be home, at work or anywhere else. It's not true?

    On the other hand, not everyone has the luxury of owning an air conditioning. Some financial reasons, other, more concerned with the environment, because the air conditioning emits greenhouse gases (CO ² and HFCS), both linked to global warming.

    To the joy of many, an affordable alternative to all pockets, more "green" and as efficient as the famous traditional air-conditioning. The invention is of two researchers from the University of Colorado, It is in the U.S.. Ronggui Yang and Yin Xiabo created a film that is capable of cooling environments without the need to use gas and electric cooler. The study was published in Science magazine.

    As the film works?

    The film plays in the process of filtering of the Sun's rays on the Earth's atmosphere. The atmosphere lets some red wavelengths, bringing the heat, escape into space with no obstacles. What scientists Yan and Yin did, was the conversion of unwanted heat in infrared radiation in the exact length of wave the planet send back.

    Already the film created by scientists is made of polimetilpentano, which in your time is a transparent plastic found in trade and comes with addition of glass pebbles. Silver-coated on one side, the material is transformed into thick blades 50 millionths of a meter.

    When the film is placed on a roof, the silver side stays low. Like this, sunlight is reflected by the silver side through the plastic, What prevents the environment heating. Besides, the internal heat is also released into the atmosphere.

    The cooling power of the film comes to 93 Watts per square metre. At night, for example, your ability is even greater. According to the researchers, about of 20 m ² of the film are sufficient to maintain the temperature of a house common in 20° C in a day when the thermometers marking 37° C.

    Film manufacturing.
    The magazine "The Economist", reports that the film can be produced using methods traditionally employed by industry and cost around 50 cents per m ²”.

  • “PLASTICS IN THE SEAS”

    Plástico nos mares

    Plastic in the seas

    “Jason de Caires Taylor created the work in partnership with Greenpeace as a way to criticize the pollution of oceans. The marine life and other animals that benefit from the seas, as the seagulls, is largely threatened by numerous account plastic pieces that take thousands of years to decompose in nature.
    Studies show that about 90% of seabirds has some kind of plastic particle in your stomach – a given alarming to all world fauna. "The problem highlighted in this sculpture would have seemed surreal for 50 years, but now is a grim reality. All plastic is done on land and this is where we need to see actions to reduce your flow to our oceans ", Louise Edge activist alert.
    It is believed that annually are dumped more than eight tons of plastic in the oceans of the entire planet. "That's the equivalent of finding five bags full of plastic each 30 cm us coast 192 countries that we have examined ", explains Jenna Jambeck, Professor of environmental engineering at the University of Georgia.”

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