Approximately 1.5 billion tons of tyres are produced each year around the world - meaning just as many will need to be disposed of some day. Good news: they're driving forward the circular economy.
In India, Toter is an app that wants to change the way individuals and businesses recycle and manage waste - adding a technological edge and a great deal of respect to an age-old and much-maligned industry.
A smart paint could soon be helping blind people navigate cities by sending vibrations to their canes at street crossings.
It can be hard to make your way across the street in a busy city - constantly dodging cars, bikes and other pedestrians. What about for those who are visually-impaired?