Obese teenagers can have certain brain differences from their thinner peers -- changes that might signal damage from inflammation, a new, preliminary study suggests.

Accurately measuring oil workers’ exposures to potentially toxic materials has long been problematic. Continuous sampling, in particular, was impossible because the equipment necessary for 24-hour sampling was too bulky to be delivered to remote sites in a timely manner.

Air pollution in Europe comes with a high price tag, according to a new report from the European Environment Agency (EEA). While policies have improved air quality overall, air pollution is still the main environmental health hazard, resulting in high costs for health care systems, unhealthy workers and an estimated 400,000 premature deaths in Europe in 2011.