The agriculture market accounts for more than 10 percent of all odorized propane sales in the United States — almost 1.5 billion gallons a year. Agriculture is a business, so for propane to be a leading agricultural energy choice, our industry must always look for new and improved technologies that provide sound business solutions for the farmer. The propane industry, through the Propane Education & Research Council (PERC), is funding research and development efforts that do just that.