Marketplace looks at the racial demographic shift in South Los Angeles some 20 years after the 1992 L.A. Riots.
How can China slash carbon emissions, to help slow global warming, if it can’t even lessen the air pollution that’s smothering its cities? The United States had its own terrible air pollution not all that long ago. How the U.S. came to grips with smog and acid rain offers lessons on what it takes for a nation to act – and how long it can take.