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Glass recycling is the process of turning waste glass into usable products. Glass waste should be separated by chemical composition, and then, depending on the end use and local processing capabilities, might also have to be separated into different colors. Many recyclers collect different colors of glass separately since glass retains its color after recycling. The most common types used for consumer containers are colorless glass, green glass, and brown/amber glass. The process of recycling glass is very convenient because the materials that consist in glass can be recycled without much of the fibers burnt or lost once a product is used. Glass makes up a large component of household and industrial waste due to its weight and density. The glass component in municipal waste is usually made up of bottles, broken glassware, light bulbs and other items. Adding to this waste is the fact that many manual methods of creating glass objects have a defect rate of around forty percent. Glass recycling uses less energy than manufacturing glass from sand, lime and soda. Every metric ton (1,000 kg) of waste glass recycled into new items saves of carbon dioxide from being released into the atmosphere during the creation of new glass.〔(【引用サイトリンク】 Glass recycling information sheet ) 〕 Glass that is crushed and ready to be remelted is called cullet.〔(【引用サイトリンク】url=http://www.epa.gov/osw/conserve/materials/glass.htm )〕 Many collection points have separate bins for clear, green and amber. Glass reprocessors that intend to make glass containers require separation by color, because glass tends to retain its color after recycling. If the recycled glass is intended for other products, or if the glass reprocessor uses newer optical sorting equipment, separation by color at the collection point may not be required. Heat-resistant glass like Pyrex or borosilicate glass should not be disposed of in the glass container as even a single piece of such material will alter the viscosity of the fluid in the furnace at remelt. 〔(【引用サイトリンク】title=First in glass: 10 homegoods for Recycle Glass Month )〕 ==Recycling into glass containers== When glass is used for new container manufacturing, it is virtually infinitely recyclable. The processing and use of recycled glass in manufacturing conserves raw materials, and reduces energy consumption. That which is not recycled, but crushed, reduces the volume of waste sent to landfills.〔British Standards Institute (2005) PAS 101, Recovered container glass, Specification for quality and guidance for good practice in collection〕〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「glass recycling」の詳細全文を読む スポンサード リンク
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