Many innovative designs have experimented with producing clean water from contaminated or salt water. A new approach takes inspiration from mangrove trees.

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.

Water security is increasingly becoming one of the fundamental issues of the 21st century, especially for states in the dryer and more arid regions of the world. With water forming the basis of all life, some nations are adopting increasingly radical solutions to ensure a fresh supply of water. For example, states such as the