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  2. Metal roof - Wikipedia

    en.wikipedia.org/wiki/Metal_roof

    Metal roofs are 100% recyclable and can be made from other recycled products. Asphalt shingles are petroleum based with other chemicals making their recycling process more toxic, most shingles are not recycled and 20 billion pounds (9.1 million tonnes) are sent to landfills every year and take hundreds of years to decompose.

  3. Reflective surfaces (climate engineering) - Wikipedia

    en.wikipedia.org/wiki/Reflective_surfaces...

    As part of the new efforts, DOE will install a cool roof, whenever cost-effective over the lifetime of the roof, during construction of a new roof or the replacement of an old one at a DOE facility. In October 2013, the United States Department of Energy ranked Cool Roofs as a 53 out of 100 (0 to 100 weighted average) for a cost-effective ...

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  6. Poly(methyl methacrylate) - Wikipedia

    en.wikipedia.org/wiki/Poly(methyl_methacrylate)

    The first acrylic acid was created in 1843. Methacrylic acid, derived from acrylic acid, was formulated in 1865.The reaction between methacrylic acid and methanol results in the ester methyl methacrylate.

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  8. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    PDRCs can come in a variety of forms, including paint coatings and films, that are designed to be high in solar reflectance and thermal emittance. [121] [123] PDRC applications on building roofs and envelopes have demonstrated significant decreases in energy consumption and costs. [123]