“PM2.5” seems an odd and wonky term for the blogosphere to take up, but that is precisely what has happened in China in recent weeks. It refers to the smallest solid particles in the atmosphere—those less than 2.5 microns across.
This map is a work in progress. The uses of water, air and land are diverse in New Mexico and will change dramatically with climate change. For caretakers of this sacred trust, the map offers a bird’s eye view of the health of our environment.
Increase of 52% to $10.3bn in 2011 was based on strong solar performance
New Scientist
Iceland has lots of geothermal energy, Norway has hydropower. The wind blows hard in Scotland and the sun always shines in North Africa. Helen Knight explores plans to connect these diverse sources to a single network
Amy O'Donnell
World Radio Day celebrates radio's role in empowering people in remote communities – not just as a source of information, but increasingly as a way to make their own voices heard
david biello
Millennium development goals: Two down, six to go
The United Nations has met two of its eight development goals, well ahead of the 2015 deadline. Six goals are left.
UNITED NATIONS — The world’s nations achieved a U.N. goal of cutting in half the proportion of people without access to safe drinking water five years ahead of the 2015 target, the United Nations announced Tuesday.
JOANNA M. FOSTER
In 2008 and in 2011, the world was rocked by riots and by revolutions coinciding with spikes in food prices.