Meet the companies tackling nine of humanity's biggest problems -- and making millions saving us from ourselves.
Problem #6: Overfishing
Problem #6: Overfishing
The background: Overfishing is depleting wild ocean fish stocks and threatening the $158 billion commercial fishing industry.

The solution: Hawaii startup Kona Blue is pioneering deepwater aquaculture to farm ocean fish. Although many companies grow freshwater tilapia and catfish, few have succeeded in farming flavorful deep-sea fish like yellowtail tuna and swordfish. Privately held Kona Blue raises a yellowtail-like fish off the coast of the Big Island of Hawaii - half a mile out to sea and 30 feet down.

Marine biologists Dale Sarver and Neil Anthony Sims raise Hawaiian amberjack, a native species that is called kampachi in Japan. Unlike most fish farms, Kona fish are raised in a controlled environment from hatch until harvest. The fish, called Kona Kampachi, retails for about $20 a pound.

The payoff: Former Horizon Organic chairman Tom McCloskey, now Kona Blue's chairman, says sales will reach $8 million to $10 million in 2007, up from just $2 million last year. Kona Blue is sold at select Whole Foods stores and served at the tables of top restaurants like the French Laundry in California's Napa Valley.

The opportunity: Kona Blue does not yet have any direct competitors employing its fish-farming techniques, though a couple of companies are gearing up their operations.

Global Warming

Oil Dependency

Hunger and Malnutrition

Dirty Air

Dirty Water

Overfishing

Epidemics

Drug-Resistant Infections

Waste Disposal
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Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer Morningstar: © 2014 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2014 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2014. All rights reserved. Most stock quote data provided by BATS.