In 1929 after a man who worked for the USGS wanted to make sure there were enough materials and technological advancements after the war on metal production.
He considered 4 important factors to make sure metal production would be made: Geology, Technology, Economics, and Politics.
“The history of sulfur extraction and production technology also reflects continuous improvement upon processes developed from other industries to meet changing materials use requirements and societal needs".
The Clean Air Act of 1970 made rules for getting sulfur from oil refining, processing of sulfide, ores, and even the combustion of electricity generation.
Technology Trajectory doesn't just focus on firms or engineers but it can deal with healthcare, schools, the daily life of everyone, and much more.