Define : e-retailing and COD
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Electronic retailing is the sale of goods and services through the Internet. E-tailing can include business-to-business (B2B) and business-to-consumer (B2C) sales of products and services. Amazon.com (AMZN) is by far the largest online retailer providing consumer products and subscriptions through its website.
The chemical oxygen demand (COD) is a measure of water and wastewater quality. ... The COD is the amount of oxygen consumed to chemically oxidize organic water contaminants to inorganic end products.
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Explanation:
chemical oxygen demand
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