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Glass: Difference between revisions
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== Overview == | == Overview == | ||
Glass is defined as 'a hard, transparent material, used to make windows, bottles, and other objects'<ref>Cambridge Dictionary, 2019. [https://dictionary.cambridge.org/dictionary/english/glass GLASS | meaning in the Cambridge English Dictionary. Cambridge.org.] [online] [Accessed 5 Dec. 2019].</ref>. It is formed from a melt by cooling to rigidity without crystallization and is a usually transparent or translucent material consisting typically of a mixture of silicates'<ref>Marriam-Webster, 2019. [https://www.merriam-webster.com/dictionary/glass Definition of GLASS. Merriam-webster.com.] [online] [Accessed 5 Dec. 2019].</ref>. | Glass is defined as 'a hard, transparent material, used to make windows, bottles, and other objects'<ref>Cambridge Dictionary, 2019. [https://dictionary.cambridge.org/dictionary/english/glass GLASS | meaning in the Cambridge English Dictionary. Cambridge.org.] [online] [Accessed 5 Dec. 2019].</ref>. It is formed from a melt by cooling to rigidity without crystallization and is a usually transparent or translucent material consisting typically of a mixture of silicates'<ref>Marriam-Webster, 2019. [https://www.merriam-webster.com/dictionary/glass Definition of GLASS. Merriam-webster.com.] [online] [Accessed 5 Dec. 2019].</ref>. | ||
Glass is a resource that can be continuously recycled without a decline in quality. The four main constituents of glass are sand, soda ash, limestone and other additives for colour or special treatments, these materials are not in shortage but the quarrying required to obtain them is energy-intensive and has consequential environmental impacts<ref name="foo"/>. | |||
In the UK, about 50% of glass waste arises from containers (bottles, jars, etc), this is a figure that has doubled in the last 5 years but is still behind many countries, for example, Switzerland and Finland recycle over 90% of their glass <ref name="foo">Recyclenow, 2019. [https://www.recyclenow.com/recycling-knowledge/how-is-it-recycled/glass How are glass bottles recycled? | Recycle Now.] Recyclenow.com. [online] [Accessed 5 Dec. 2019].</ref>. To be recycled, glass undergoes the following steps after it is collected from kerbside or bottle banks: | In the UK, about 50% of glass waste arises from containers (bottles, jars, etc), this is a figure that has doubled in the last 5 years but is still behind many countries, for example, Switzerland and Finland recycle over 90% of their glass <ref name="foo">Recyclenow, 2019. [https://www.recyclenow.com/recycling-knowledge/how-is-it-recycled/glass How are glass bottles recycled? | Recycle Now.] Recyclenow.com. [online] [Accessed 5 Dec. 2019].</ref>. To be recycled, glass undergoes the following steps after it is collected from kerbside or bottle banks: | ||
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*moulding or blowing into new bottles or jars<ref name="foo" />. | *moulding or blowing into new bottles or jars<ref name="foo" />. | ||
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== Macro Tonnages == | == Macro Tonnages == | ||
The most recent information published by DEFRA <ref>[https://www.gov.uk/government/statistics/digest-of-waste-and-resource-statistics-2018-edition Digest of Waste Resources 2018] reporting data from 2016</ref> <ref>[https://www.gov.uk/government/statistics/uk-waste-data UK Statistics on Waste 2019] updating some of the 2018 Digest with 2017 data</ref>is summarized in the pie chart below, with 1,338,153 tonnes of glass waste generated in the UK in 2016 and is part of the broader tonnage summarized in [[UK Waste Tonnage]]: | The most recent information published by [[DEFRA]] <ref>[https://www.gov.uk/government/statistics/digest-of-waste-and-resource-statistics-2018-edition Digest of Waste Resources 2018] reporting data from 2016</ref> <ref>[https://www.gov.uk/government/statistics/uk-waste-data UK Statistics on Waste 2019] updating some of the 2018 Digest with 2017 data</ref>is summarized in the pie chart below, with 1,338,153 tonnes of glass waste generated in the UK in 2016 and is part of the broader tonnage summarized in [[UK Waste Tonnage]]: | ||
[[File:Glass Waste Pie Chart.png|frame|center|Glass Waste - Tonnage Reported as Generated by DEFRA in 2016]] | [[File:Glass Waste Pie Chart.png|frame|center|Glass Waste - Tonnage Reported as Generated by DEFRA in 2016]] | ||
== Brown Glass == | == Brown Glass == | ||