![PopTech Audio: PopCasts show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/053/095/small/poptech-audio-popcasts.jpg)
Summary: <p>Author, futurist, activist and visionary, the inimitable Stewart Brand puts a lens to the next 30 years of the green movement. He sees increasing urbanization, new cities full of young people, the expansion of environmentalism and more.</p>