LONDON - From solar-powered Christmas lights and cellphone chargers to smart home thermostats, there are plenty of gifts available for technology lovers interested in saving energy.

And since upgrading your favorite device less frequently might be the best conservation measure, some designers, companies and environmentalists are also looking for ways to ensure that more old electronics are reused or recycled, hoping to reduce the environmental impact of the gadgets that are so central to modern life.

http://www.nytimes.com/2013/12/16/business/energy-environment/smart-gifts-and-old-devices-made-new-a...