Make a city beautiful, curb corruption. Edi Rama took this deceptively simple path as mayor of Tirana, Albania, where he instilled pride in his citizens by transforming public spaces with colorful designs. With projects that put the people first, Rama decreased crime — and showed his citizens they could have faith in their leaders. (Filmed at TEDxThessaloniki.)... Read More إقرأ المزيد | Share it now!

Paved roads are nice to look at, but they’re easily damaged and costly to repair. Erik Schlangen demos a new type of porous, asphalt made of simple materials with an astonishing feature: When cracked, it can be “healed” by induction heating. (Filmed at TEDxDelft.)... Read More إقرأ المزيد | Share it now!