Health savings of up to 25 billion euro could be achieved every year in the European Union if stronger climate policies were implemented, says a new study.

The world population has increased 50 percent over the last half century alone. That is a staggering 3 billion more mouths to feed. Despite a serious backlash during the last year, never before have so many had food to eat. And never before have so many suffered from being overweight and obese. Both under nourishment and over eating are increasing.

Close collaboration between scientists in China, India, Italy, Switzerland, and IIASA has resulted in a tool to help policymakers in China and India make sense of the complexities of air pollutant controls and greenhouse gas mitigation.

Local climate change policy making in Japan started in the middle of the 1990s. The national government

For all its economic capacity, population size, and resource base, California remains only one among the 50 United States and, essentially, is a subnational actor attempting to play a role in the climate change policy arena on par with the nation-states of the world. This raises a series of questions about the substance and breadth of the state's new policy and what has motivated it.