Tampa-Yara International ASA, the leading diesel emissions fuel producer in the world, reports that it has achieved the 250 million gallons sales mark this month. Its brand for DEF, Air1®, is now present in over 50 countries, serving thousands of customers across 5 continents. The growth of the Air1® total service solution is driven by evolving environmental emission regulations first introduced in Europe in 2006, which were followed by the more stringent North American emission levels set forth by the EPA 2010 Clean Air Act. Yara, being a pioneer, participated in setting the DEF production quality standards that are now established in the U.S. and Canada and the rest of the world. “We have helped customers get started with DEF around the world,” said Rolf Isberg, Head of Air1®. “Not only do we bring the right quality solution, but also we are able to answer all the questions customers have when they get their first SCR trucks. We have the expertise it takes to smoothly assist fleets needing this product.” Used in conjunction with SCR engine technology, DEF chemically adjusts harmful NOx emissions, releasing harmless nitrogen and steam into the atmosphere instead.