He has long criticized the Obama administration's Environmental Protection Agency, saying that its proposals to tighten emission standards on coal - burning power plants are killing American jobs. (apnews.com)
At the Frankfurt motor show, Mercedes - Benz revealed its vision of how the range - topping S - class coupe will evolve against a backdrop of increasingly tightening emission standards with the unveiling of... (autoweek.com)
Even as America tightens emission standards, the fast - growing economies of Asia are filling the air with hazardous components that circumnavigate the globe. (discovermagazine.com)