Afro-descendants in Latin America have had a different experience from those in the US, experts say. Despite this, social, economic, and cultural discrimination has been historically very strong.
More than a billion people worldwide lack access to electricity. The best way to bring it to them is to provide ever-cheaper, clean, locally produced solar power that can replace dirty and dangerous kerosene.
US government system, using ground sensors and satellite imagery, helped to predict this year's drought in Horn of Africa, allowing aid groups and governments to prepare relief.
Canada on Monday became the first country to announce that it would withdraw from the Kyoto protocol on climate change. Did the promise of riches from the country's vast tar sands reserves play a role?