Each Autumn dozens of grey whales migrate along the Pacific coast from the Bering Sea to spend winters in warm southern waters. Some take refuge in a series of lagoons on Mexico's isolated Baja California peninsula to give birth. But, the whales aren't always able to raise their young in peace. Only one of the lagoons remains largely wild, and now even that could change. In a joint venture, the Mexican government and the Mitsubishi Corporation are planning a massive salt evaporation complex there in a bid to make Mexico the world's largest producer of salt. Scientists aren't sure about the impact of the salt works, but there are fears it could disrupt the breeding of the whales which have only recently rebounded after being nearly wiped out by hunting. From Mexico City, Jana Schroeder reports.