Proceedings of the National Academy of Sciences

November 24, 2015, 10am PST
Why are mortality rates increasing for this group in the United States and not others? The usual suspects—obesity, heart disease, diabetes, smoking are not the killers, The findings resulted in the 2015 Nobel Memorial Prize in Economic Science.
The New York Times - Health
December 17, 2014, 1pm PST
A University of Minnesota study published in PNAS looks at alternatives including ethanol and electricity and determined that "it's hard to beat gasoline." Even electric vehicles can do better or worse depending on how utilities source electricity.
AP via ABC News
November 16, 2014, 1pm PST
More people translates to more emissions, right? Cut back on population growth and you'll reduce emissions and the threat of climate change, along with other environmental woes—it's a no-brainer. Or is it?
The Washington Post - Wonkblog
January 22, 2014, 8am PST
A new study reveals two findings on air pollution spewing from China's coal-burning factories. First, the pollution blows to the U.S and other nations. Second, 20% of the pollution can be traced to Western demand for cheap goods from those factories.
Los Angeles Times - Science Now
December 6, 2013, 6am PST
The EPA has seriously underestimated the emissions of the powerful greenhouse gas, methane, particularly from oil and gas activity (five times) and from cattle and livestock operations (two times), according to a new report published in the PNAS.
The New York Times
September 19, 2013, 6am PDT
How much methane, a powerful but short-lived greenhouse gas is released during fracking operations for natural gas? Until now, all studies, including those by the EPA, were done by estimates. This study went to over 500 well sites to measure leaks.
The New York Times - U.S.
October 25, 2010, 10am PDT
A new study published in the Proceedings of the National Academy of Sciences shows how population growth increases greenhouse gas emissions. More importantly, two demographic factors shape the increase, urbanization and aging -with opposite effects.
BBC News - Science & Environment