The 18th and 19th centuries glass was very expensive and was … (1) for limited applications, such as stained glass windows for churches. Large-scale glass manufacture … (2) with the industrial revolution with the mass production of glass containers beginning at the onset of the 20th century and glass light bulb production automated in 1926. Nowadays glass is much less expensive and is … (3) for granted as a packaging material in addition to its use in windows and other applications. New glass is… (4) from a mixture of four main ingredients: sand, soda ash, limestone and other additives. Glass can be… (5) indefinitely as part of a simple but hugely beneficial process, as its structure does not… (6) when reprocessed. If recycled glass is used to…(7) new bottles and jars, the energy… (8) in the furnace is greatly reduced. After accounting for the… (9) and processing needed, 315kg of C02 is… (10) per ton of glass melted.
1. The correct answer is …
