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The Consumer Electronics Show, held in Las Vegas in early January, showcased dozens of new gadgets, including several intended to make the tech world more sustainable. Environmental website TreeHugger rounded up the most eco-friendly items on display at the convention, including an off-grid solar generator called the Yeti 150, created by a group called Goal Zero. The Yeti 150, which uses a 15W Bolder 15 Solar Panel, takes 12 hours to fully charge and can power devices such as laptops or lights.

Another hot item was the Samsung Evolution Kit, which enables people to improve and repair televisions. Rather than upgrading to a newer TV, the Evolution Kit plugs into existing sets and improves image and sound quality. Although the device is much smaller than a new television—it fits in the palm of a hand—and thus has a smaller environmental impact, critics have said the $500 price tag isn’t much incentive for consumers.

The lack of ability to repair electronics has long been a sore spot for environmentalists in technology communities—especially manufacturers like Apple, which began using the EPEAT (Electronic Product Environmental Assessment Tool) green certification program last summer after the company came under fire when consumers could not open the devices and make repairs when necessary.