Ecopolis

Aroview: Nobel Prize winner Professor Dan Kammen gives us a troubling glimpse of the city of 2050 - a place afflicted by famine, pollution, extreme heat, power failure - this is the future awaiting humankind unless we drastically reduce our carbon emissions with some radical new technology.
If you can get past the irritating Discovery Chanel format, this is science at it's best - fascinating, ingenious and surprisingly hopeful.