Salt water is poured into the top container, which then gets heated by the sun and converted to steam by solar energy. The increase in pressure forces the steam to travel through a tube to the lower container where it re-condenses. The clean drinking water gathers at the bottom of the lower container.
https://borgenproject.org/eliodomestico-water-purifier/
This clock tower in Colombo Sri Lanka served as a lighthouse between 1867 and 1952. It's also the centre from which the distances of the road network throughout Sri Lanka are measured.
IIT Madras students have developed a house than can be folded up and transported anywhere. It's a two-storey house made out of metal frames and iron panels that can be unfolded and fixed to accommodate 20 people at a time. It can be set anywhere that's flat; all you have to do is unfold its metal frames and start fixing the panels which will be the walls for the house. There are provisions for electricity and water supply as well. This construction should be especially useful when natural disasters render many homeless.
One of the biggest inconveniences of owning an electric or hybrid vehicle is how long it takes to recharge the batteries. Depending on the size of the battery and the speed of the recharging station, powering up a sustainable vehicle can take anywhere from 30 minutes to 12 hours. Researchers have developed a flow battery that would allow electric cars to be recharged instantly at stations like conventional cars are. This energy breakthrough would speed the switch to electric vehicles by making them more convenient to drive. http://www.goodnewsnetwork.org/instantly-rechargeable-battery-for-electric-cars-2017/
