Thomas Gale has published this 7 volume (100 product per volume) How Products are Made at http://www.madehow.com/index.html on the web and added a discussion forum which makes the $135/volume resource more accessible, and a good site search engine. This makes a good cross reference for HowStuffisMade entries. The primary difference between these two encyclopedic efforts is HSIM emphasis on visual documentation of actual manufacturing, including the labor conditions and the specific people involved, as opposed to the general information and diagrams of the HowMade equivalent. The HowMade is similar to HSIM in that it does begin to elaborate the environmental issues in a section that is included in most of the entires called: Byproducts/Waste. Likewise it also points toward future design innovations in the Future section.
The description on the website is:
How Products Are Made explains and details the manufacturing process of a wide variety of products, from daily household items to complicated electronic equipment and heavy machinery. The site provides step by step descriptions of the assembly and the manufacturing process (complemented with illustrations and diagrams) Each product also has related information such as the background, how the item works, who invented the product, raw materials that were used, product applications, by-products that are generated, possible future developments, quality control procedures, etc.