George Ban-Weiss, 33
A USC professor who studies climate and pollution influences policy in California.
Kuang Chen, 34
A novel way to get data off paper records and into the digital age.
Kurtis Heimerl, 30
Inexpensive boxes could help bring mobile coverage to the billion people who lack it.
Santiago Villegas, 29
An online reporting system encourages crime victims and witnesses to speak up.