Photos: Green tech giants

A staircase of sustainably forested wood graces Building 43 of Google's Mountain View, Calif., headquarters. The walls of the building are layered with nontoxic cotton soundproofing material.

Elinor Mills/CNET

By Bill Detwiler

Bill Detwiler is Managing Editor of TechRepublic and Tech Pro Research and the host of Cracking Open, CNET and TechRepublic's popular online show. Prior to joining TechRepublic in 2000, Bill was an IT manager, database administrator, and desktop supp...