In addition to Fortune's 40 Under 40 list, we're also keeping our eye on these 20 innovators, young guns from a wide range of industries and backgrounds.
|Audi makes diesel out of water and air|
|NFL gives up tax exempt status|
|Jane Goodall: SeaWorld 'should be closed down'|
|Poor kids, rich schools|
|Google took away this perk. Employees freaked out|