First of all, it ignores the fact that the value chain is connected to the environment, that resources are being extracted at the upstream end and that consumers are dumping their used products back into the environment at the downstream end.

FORBES: Sustainable Consumption Rising on the Business Agenda

The principal product is polyvinyl chloride resin, which is supplied to downstream subsidiaries to manufacture and market end-user industrial and consumer products.

FORBES: #1,487 Westlake Chemical