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Soda lime glass from virgin raw materials theoretically requires approximately 2.671 GJ/tonne compared to 1.886 GJ/tonne to melt 100% glass cullet. [6] As a general rule, every 10% increase in cullet usage results in an energy savings of 2–3% in the melting process, with a theoretical maximum potential of 30% energy saving. [ 6 ]
Regional differences in the volume of plastics production are driven by user demand, the price of fossil fuel feedstocks, and investments made in the petrochemical industry. For example, since 2010 over US$200 billion has been invested in the United States in new plastic and chemical plants, stimulated by the low cost of raw materials.
Display case shows and protects a painting by a follower of Robert Campin. A display case (also called a showcase, display cabinet, shadow box, or vitrine) is a cabinet with one or often more transparent tempered glass (or plastic, normally acrylic for strength) surfaces, used to display objects for viewing.