The World's Gerry Hadden reports that Spain's government is starting to enforce a law aimed at protecting the country's coastline. It's now demolishing structures built illegally on the country's beaches. At that's upsetting many homeowners.

Anchor Marco Werman speaks with the co-editors of a book called "The Endless City." Ricky Burdett and Deyan Sudjic set out to document how six of the world's largest cities got to be so big.

Mexico City

The World's Gerry Hadden reports that top scientists at the European Union are asking the EU to suspend a program that calls for increasing the use of bio-fuels.

The BBC's Jonathan Head reports from Manila on the steeply rising price of rice around the world.

Caroline Gluck reports that authorities in Taiwan have stepped up efforts to protect millions of Purple Crow butterflies as they make their annual migration from southern to northern Taiwan.

The World's Quil Lawrence reports on a Palestinian town that's been left a no man's land by the Israeli security barrier. Pollution from the village is also forcing Israelis and Palestinians to work together to solve the problem.

Host Lisa Mullins speaks with Raj Patel, author of "Stuffed and Starved: The Hidden Battle for the World Food System".

Rising food prices across the globe are setting the stage for widespread food shortages and hunger. The BBC's Yollanda Knell has the latest from Cairo, Egypt. Phuong Tran reports from Dakar, Senegal. We also hear from Jessica Keerkorn, who works in Haiti for Doctors Without Borders.

There's a new flood barrier in Venice known as the Moses project. It's holding back the waters, and it's also creating a haven for marine life. But some environmentalists say it's doing damage. Anchor Lisa Mullins speaks with Michele Candoti with the environmental group WWF Italy.

The World's Jason Margolis reports that some insurance companies are starting to make global warming a factor in their policies, in some cases encouraging positive action to deal with climate change.