The US aviation industry has grown to be the most robust in the world, shuttling millions of passengers from one point to another every year. According to the New Jersey Institute of Technology, more than 8.5 million flights departed from US airports in 2014 alone. In addition, the number of airports increased from 15,161 in 1980 to 19,453 in 2013. Along with this rapid expansion, and under the aviation industry’s veneer of transport efficiency, lies a deadly secret very few people are willing to discuss in air travel: deadly toxins emitted through the day-to-day operations of the industry. To learn more deadly airport toxins, checkout the infographic below created by the New Jersey Institute of Technology’s Masters in Civil Engineering Online degree program.