Kate Brandt has a radical idea for how we’ll have to live in the future, if we’re going to be in balance with nature. She envisions a world without landfills, where ownership is obsolete, and everything down to the socks on our feet is rented and shared. Brandt is Google's sustainability officer. And she’s obsessed with one idea: the “circular economy,” which aims to eliminate waste.

Get in-depth coverage of current and future trends in technology, and how they are shaping business, entertainment, communications, science, politics, and society.