Fred de Sam Lazaro of Twin Cities Public Television looks at the international source of some telemarketing calls.
Tom Bearden reports from Colorado on healing the scorched land affected by last summer's wildfires.
Margaret Warner speaks with John Fenn, one of the winners of the Nobel Prize in chemistry and a research professor of chemistry and engineering at Virginia Commonwealth University in Richmond.
Ray Suarez speaks with Riccardo Giacconi, one of the winners of the Nobel Prize for Physics.
Jeffrey Kaye of KCET, Los Angeles reports on the tough new fishing regulations roiling the waters off the coast of California.
A United Nations summit aimed at improving living conditions for the world's poor without damaging natural resources opened Monday in the South African capital of Johannesburg.
At a United Nations conference in South Africa, thousands of delegates seek agreement on ways to grow the economies of developing nations while protecting the environment.
Tom Bearden reports on the opening day of the United Nations Summit on Strategic Development in Johannesburg, South Africa.
Ted Robbins of KUAT Tuscon reports on the parched Colorado River delta.
Spencer Michels looks at the president's new plan to prevent future forest fires by thinning national woodlands.
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