Scientists in Jena are working on a technology to efficiently store and provide energy as needed. New are the materials used: plastic and saline solution.
Puerto Rico is still picking up the pieces after Hurricane Maria. Solar power has helped some get back on their feet, but as hurricane season comes round again many fear their island just isn't prepared.
Digitalization is spurring on Germany's switch to renewables and away from nuclear. Power-generating homes, smart grids and new forms of clean energy storage are enabling Germans to go even greener.
Building a completely solar-powered town is a challenge, even in very sunny Florida. And not just for technical reasons. Getting average buyers to go green sometimes means having to compromise.
Billionaire Tesla owner Elon Musk is to make good on a promise to solve South Australia's energy crisis within 100 days or his company's services will be free. The battery will be able to store energy for 30,000 homes.
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