Glass is among the most energy intensive industries, along with making Cement, Gypsum Board, Aluminum, and electrical power.
The embedded energy costs of glass are one thing that make photovoltaic electric cells not the bargain they would seem to be
Recycling glass generally saves 25-32% of the energy required to produce glass. A ton of recycled glass saves 42 Kwh of energy. Using these figures, a conservative estimate requires 131.25 Kwh for a ton of glass.
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