While true gadget obsessions aren’t always green—they often mean getting rid of equipment that still works, while gadgets that aren’t recycled waste countless amounts of resources and precious metals—technology that lets you live a greener life is the best of both worlds. See our fail-safe gift ideas for the geek in your life here.
Click through to the slideshow for solar chargers, energy-efficient computers, solar-powered Bluetooth speakers, and iPhone apps that point you to the best in green shopping, eating, and buying will thrill every technology buff on your list. Shopping for a DIY fanatic or a hard-core athlete? Stay tuned for our other lists--and check back all week for more ideas for everyone from newlyweds to newborns.