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Peru
Bangladesh
Into thin air
Pilgrims have journeyed to Peru's glacier pilgrimage for hundreds of years. Now the glacier's sacred ice is melting into thin air.
Sinking below sea level
Dec. 7: With the surrounding waters rising due to global warming, children in Bangladesh are being taught what has become a critical survival skill--the ability to swim.
More videos
Winds of change? Residents embrace air power
June 13: On opposite sides of the Potomac River sit symbols of U.S. electricity, both present, and possibly future: smokestacks of coal-fired power and a personal wind turbine. NBC’s Anne Thompson reports.
Video series on Nightly.msnbc.com 
Saving the Chesapeake Bay
June 23: The Chesapeake Bay, the largest estuary in the United States, is in critical condition. After more than 30 years of rescue efforts, trailblazing work and hundreds of millions of tax dollars, the Bay's future remains anything but clear. In this first part of a multi-part series we kick off, NBC's Wendy Reiger says that despite good intentions, the Bay project still needs oxygen.
