Madrid takes steps to curb air pollution

Locals call it "the beret": a gray layer of exhaust fumes that blots out Madrid's blue skies on still days. For asthma sufferer Conxi Grau, it feels more like a tight scarf.

Like many residents of the Spanish capital, she suffered during several days of high pressure in early January. Now they want to cast off the beret for good.

Campaign group Ecologists in Action has taken up the case in the courts, suing local authorities for breaches of pollution limits.