Today on The World: US lawmakers returning from China give positive reports on their talks on climate change; The trickle-down effect of the sinking economy on undocumented day laborers Los Angeles; and the Israeli government pushes for more housing in the West Bank.

US congressional delegates wrapped up their visits to China this week. The World's Mary Kay Magistad reports that many delegates sound hopeful about working with China on climate change initiatives.

Ningxia has been labeled China's least energy efficient province

A 3-day Nobel Laureates Symposium just took place in London to brainstorm on environmental issues. Anchor Lisa Mullins gets an overview from the BBC's environment and science correspondent David Shukman.

One of the participants at this week's Nobel symposium on climate change was Yuan Tseh Lee. He's a native of Taiwan who won the Nobel Prize for Chemistry in 1986. Anchor Lisa Mullins speaks with him about the meeting that just ended in London.

Environmental scientists are excited about ideas for reducing carbon in the atmosphere through geo-engineering. Anchor Lisa Mullins has details.

The World's Jason Margolis reports on how the recession is affecting undocumented day laborers struggling to get by in Los Angeles.

Series page: Immigration during times of recession

Anchor Lisa Mullins speaks with CBC reporter David Common, who's aboard a Canadian warship currently patrolling the waters off the coast of Somalia in search of pirates.

The World's Jeb Sharp reports on a new book about the history of the US military base on the island of Diego Garcia in the Indian Ocean. The people who lived on the island were expelled to make way for the base, and many of them are still fighting to go home.

Our daily geography quiz.

Reporter Linda Gradstein takes a look at the new Israeli government's stance on settlements in the West Bank.