Morning Edition

Next to Mumbai's bustling international airport, a boy picks through refuse, looking for pieces he can recycle and sell to support his family of 11. He is a resident of Annawadi, a slum built on a patch of reclaimed swampland — now fringed by luxury hotels.

As economists and activists fret over increasing income inequality in America, scenes like this one from journalist Katherine Boo's new book, Behind the Beautiful Forevers, are a forceful reminder of the extreme disparity of wealth that exist all over the world — and what people must do to survive.

New research indicates excessive consumption of sugar leads to an increase in all kinds of chronic diseases. But how much sugar is too much? Would making sugary foods more expensive help to get consumers to cut back?

Minnesota holds non-binding GOP caucuses Tuesday. Newt Gingrich, Rick Santorum and Ron Paul all campaigned in the state Monday. Each of front-runner Mitt Romney's rivals is looking at the state as a place where they can regain their footing.

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STEVE INSKEEP, HOST:

And let's move now, from paper promises, now, to plastic. That's our last word in business.

RENEE MONTAGNE, HOST:

Citigroup says it has become the first Western bank with permission to issue credit cards under its own brand in China. Until now, China required western banks to co-brand with Chinese operators.

Activists say dozens of people were killed yesterday in the Syrian town of Homs when government troops opened fire with tanks and machine guns. More than a dozen others were killed elsewhere. Renee Montagne talks to Omar Shakir, a human rights activist, who is in Homs.