Tonga, a remote chain of 176 lush islands spread over 500 miles of the Pacific Ocean, faces potentially devastating effects from climate change. As part of her series on small islands and climate change, Worldfocus producer Megan Thompson visited Tonga and documented the government's campaign to get the word out about the issue -- both at home and abroad.

In this Worldfocus signature story, we take another look at the drastic consequences of climate change. The Maldives, an island chain off the southwest coast of India, find themselves being consumed by rising sea levels. For a look at how the Maldives are trying to deal with the problem, Worldfocus producer Megan Thompson traveled there recently.

Worldfocus producer Megan Thompson recently traveled around the world in 18 days to see firsthand the effects of climate change on small island nations. In the Caribbean, she heard from residents of Grenada and Antigua how rising tides are dramatically effecting their livelihoods.

China and India -- the world's two most populous countries -- have formally agreed this week to be part of the climate change accord that was worked at last December's climate change conference in Copenhagen. The nonbinding document calls for limiting the rise in global temperatures. Andrew Potter of Al Jazeera English reports on the significance of the news.

Regardless of what the long-term implications of Copenhagen may be, the conference was different from others in the past. Perhaps most notable was how the nations of the developing world came together to make their case. Daljit Dhaliwal interviews Lane Greene, an international correspondent for The Economist who recently returned from Copenhagen.