Cairo probably isn’t the first city where you would expect to see a multi-billion dollar eco complex. But that is set to be a reality within four years, thanks to futuristic plans designed by Belgian-born architect Vincent Callebaut. The Gate Residence will be built in the city’s Heliopolis district and feature 1,000 apartments powered by solar panels, wind turbines and heating tubes. Living columns of vegetation that use the Sun’s rays to heat water and […]