Diesel

The study shows that the chemical reaction used in diesel filters can increase the presence of nitrogen dioxide—and worsen common allergic reactions.

The policy would have required that the data for all scientific studies used to justify major regulatory actions be publicly available.

Activists hold a demonstration against diesel cars in front of the Transport Ministry in Berlin, Germany, on March 14th, 2018.

A round-up of images from Viewfinder, Pacific Standard's daily photo feature.

Greenpeace activists stage an action against diesel cars on February 19th, 2018, in Stuttgart, Germany.