To turn off a Fitbit Charge 2, you'll have to let it run out of battery, or else restart it to fix issues. Here's how to ...

You can turn off auto-brightness on your iPhone with a few taps, and manually change the phone's brightness in two ways. Here ...

Knowing about the environmental cost of using energy does not drive people to use less, according to a new study.

Choking back exhaust fumes, 22-year-old Rihana Saif stands at a traffic signal in India's capital New Delhi, holding a sign mounted on a bamboo stick imploring motorists to turn their engines off.