Comment Re:Nothing new (Score 1) 202
If sand were the only input to glassmaking, perhaps. But energy is also a large input, glass furnaces run up to 1500 degC. It takes less energy to melt existing glass than it does to make new glass.
Waste glass (which is called cullet) can also be recycled into other products. This typically replaces sand, so what's the point? While sand may be plentiful, it must also be collected, refined/sorted, and shipped to the point of manufacture. Glass is used everywhere, and in many parts of the country we're already doing the collection/sorting.
Waste glass (which is called cullet) can also be recycled into other products. This typically replaces sand, so what's the point? While sand may be plentiful, it must also be collected, refined/sorted, and shipped to the point of manufacture. Glass is used everywhere, and in many parts of the country we're already doing the collection/sorting.