The World's Jason Margolis reports that interest in nuclear power plants is increasing around the world. Concerns about global climate change are driving the trend, because nuclear power plants emit no carbon dioxide. So governments from Washington to Beijing and many places in between are investing in nuclear energy.

Today we're looking for a central Mexican state that borders the state of San Luis Potosí ... and the state of Mexico. The answer is the state of Queretaro. The World's Jason Margolis takes us there to explore the Sotano Del Barro. It's a deep underground well created millions of years ago by shifting tectonic plates.

Our daily geography quiz.

For the first time, foreign banana workers have had their day in US court. And they've won. A group of Nicaraguan workers sued Dole Food and Dow Chemical. They claimed they became sterile after exposure to a pesticide used in the 1970s on banana plantations around the world. The World's Julia Kumari Drapkin has the details.

Anchor Marco Werman speaks with wildlife conservationist Alan Rabinowitz about his struggle to create a tiger reserve in Burma...home to the second largest tiger population in the world. His latest book is called "Life in the Valley of Death: The Fight to Save Tigers in a Land of Guns, Gold and Greed".

For today's Geo Quiz we were looking for the largest freshwater lake in Japan. The answer is Lake Biwa. The lake's been overtaken by an invasive species of fish... which came to Japan from the US courtesy of Japan's emperor. The World's David Leveille has the story.

For today's Geo Quiz we were looking for the Russian port city that's dealing with an environmental disaster this week. The answer is Kavkaz. Rescue and clean-up operations are underway as a damaged Russian oil tanker leaks a half million gallons of oil into Russia's Black Sea. Anchor Marco Werman gets more on the story from Dario Thuburn.

Mexico's President Felipe Calderón says the floods hitting southern Mexico are among the worst natural disasters in the country's history. Authorities say as much as 70 % of the state of Tabasco is under water. The World's William Troop reports.

More than a half a billion people in Sub-Saharan Africa don't have access to electricity. But now, a non-profit organization that has had success with its wind-up radio is using the same technology to turn on the lights. The World's Technology correspondent Clark Boyd reports.

The World's Aaron Schachter reports that the price for a barrel of crude oil topped 96 dollars in some markets today. That poses the question: can the global economy survive 100-dollars-a-barrel for oil?