Japanese startup Yumes Frontier has developed a 2.7 kW micro-hydropower system that can be used in some buildings. It can also be combined with solar to provide power for lights and surveillance ...

Around 3.6 million households in the Philippines are not connected to the national power grid. In the country’s mountainous north, some villages have overcome this challenge by building and ...

Lost in the woods near a stream, with some empty water bottles, wire, plastic plates, and a stepper motor, *and* you need to charge your smartphone? Try this. OK, so perhaps you wouldn't ever be ...