chapter  5
Model Treatment of the Paper-Recycling System
Pages 20

Currently, the IDEA database contains approximately 400 unit processes and about 400 products. The data represent the state of the art in the late 1980s in production, transport, and so on. The unit processes describe either entirely or in part the following 11 economic sectors:

1. Fuel, minerals, and mining. 2. Energy conversion. 3. Goods transportation. 4. Inorganic chemicals production. 5. Organic chemicals production. 6. Glass production.