Humidity is all around us, and it could be a power source that is going to waste. One Israeli startup is harnessing humidity for home heating.
Converting older buildings with energy saving insulation is often costly and time consuming. A German startup wants to make the process more efficient and convenient.
Solar thermal water heaters have been around for a while, but their expensive and scale means they're only available to wealthy homeowners. A new flat-pack version wants to change that.