Google recycles 100% of the electronic equipment that leave their data centers- Google Green
Since 2007, we've repurposed enough outdated servers to avoid buying over 300,000 new replacement machines. Before we buy new equipment and materials, we look for ways to reuse what we already have. When we can’t find a new use for our equipment, we completely erase any components that store data, and then resell them into the market—giving our equipment a second life.
Know more about Google Green here: http://www.google.com/green/efficiency/