Calif. drought challenges state's businesses

California's punishing drought — which led to the first mandatory statewide water restrictions in state history last week — will bring more pain to some businesses and prosperity to others if it doesn't let up soon.

Now in its fourth year, the drought has already left a swath of losers — from farmers and ski areas to golf courses and wildlife — but also a few winners, as businesses and innovators find ways to adapt to what might be the future climate of California.