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Water scarcity affects every corner of the globe. Around 1.2 billion people — almost 20 percent of Earth’s population — lives with the constant worry of not having enough drinking water to survive, according to the United Nations.

However, almost three-quarters of this world we inhabit is covered in water, the vast majority of which is undrinkable salt water. And it’s this problem that a crack team of innovators in London is looking to solve.

Having lived in United Arab Emirates’ capital, Abu Dhabi, for more than five years, William Janssen was already accustomed to drinking desalinated water — seawater treated in large machines that consume lots of energy. So Janssen came up with the idea of using solar energy instead to transform salt water into drinking water, a more sustainable, cost-effective method.

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