Heavy rainfall has allowed the Central American country of Costa Rica to be powered almost entirely by its hydroelectric plants.
The solar-powered plane is part of an effort to encourage energy-efficient aviation. Here's a look at the aircraft and how to track it from the ground.
The Solar Impulse 2 takes off from Abu Dhabi on the first leg of an attempted 20,000-mile circumnavigation of the globe -- an unprecedented journey for a sun-powered craft.
3D-printed edible shells are embedded with seeds to grow their own fillings of tasty sprouts and mushrooms.
The famous Paris landmark has been fitted with two new wind turbines that generate enough electricity to power the commercial areas of its first floor.
A humble coffee cup has big aspirations to become a forest of trees with a Kickstarter that embeds native seeds in a paper cup.
Green Creative's baseline 60W replacement LED can't quite match the competition's value.
An award-winning proposal would reclaim the disused subways beneath London, with every footstep generating energy.
Don't let the hollow look fool you -- Green Creative's BR30 Cloud LED is a solid performer.
Using a titanium dioxide gel, researchers make a battery that could one day allow electric cars to fuel up as fast as their gas-guzzling cousins.
Crave writer Amanda Kooser overcomes her distrust of unicycles by ruling the road on the Focus Designs SBU V3 self-balancing electric unicycle.
Living the green hipster life isn't all about retro tech. You can have the latest environmentally friendly innovations and still keep your hipster cred.
Gadgets under $100 for a grad
It doesn't matter if your favorite grads are moving on from high school or college, there's a gadget to get them ready.