When you have all these traces of trash moving around, you can ask yourself how can we make the system more efficient. Then we can make better decisions. And perhaps we will not throw away the plastic bottles that go every day to the dump.

The first autonomous cars date back to the late 20th century. But recent increases in sophistication and reductions in cost - reflected, for example, in cheap LIDAR systems, which can 'see' a street in 3D in a way similar to that of the human eye - are now bringing autonomous cars closer to the market.

Cities are 2% of the earth's crust, but they are 50% of the world's population.

Carlo Ratti Quotes