sustainability

Arts, Culture & Media

Geo answer

The island of Unst is the answer to today's Geo Quiz. It's the most northerly populated island off Scotland. Anchor Lisa Mullins speaks with homeowner Michael Ray who's built a zero-carbon house on the island.

Conflict & Justice

Rethinking biofuels in Europe

Biofuels have been touted as the best hope for reducing reliance on fossil fuels and limiting greenhouse gases. Now many scientists are raising doubts about that. Reporter Kathleen Schalch examines the debate over the costs and benefits of biofuels.

Arts, Culture & Media

Geo answer

The answer to today's Geo Quiz is the Kamchatka peninsula in Russia's far east. Anchor Marco Werman speaks with David Quammen who wrote about this remote area ?where salmon rule? for this month's National Geographic.

Lifestyle & Belief

Windpower from Scratch

After dropping out of school as a teenager because of poverty and drought William Kamkwamba built a windmill out of discarded materials in his village. Kamkwamba tells anchor Marco Werman how the windmill brought electricity to his tiny village in Malawi.

Global Politics

Top UN climate negotiator steps down

The top United Nations climate negotiator has resigned following his failure to secure a comprehensive treaty at the Copenhagen climate summit. The World's environment editor Peter Thomson reports on the challenges ahead for climate negotiators.