Expect to see this in ad campaigns. HP has a plan in place to cut down greenhouse gas emissions, and it was the first IT company to report those emissions. It's cut back on toxic substances (though not enough to sate Greenpeace, apparently.) It's also been aggressive with recycling.
Read more: http://www.businessinsider.com/the-15-best-companies-for-the-environment-2009-9?op=1#ixzz3SFTj3p55