Global Warming Could Account for Sardines

Warming ocean currents are bringing sardines back to Monterey Bay after decades of decline.

Some scientists think global warming could be partly responsible for the burgeoning sardine population, although no one can say for sure whether warmer water is part of a natural cycle.

"Global warming may make it so that we always have sardines in California," said oceanographer Jerrold Norton of the National Marine Fisheries Service.

The silvery fish are making a comeback from Mexico to British Columbia.