How does the propane industry contribute to the economy?

The propane industry generated nearly $46.2 billion in U.S. GDP in 2015.₁

[1] ICF International, Impact of the U.S. Consumer Propane Industry on U.S. and State Economies in 2015, (September 2017), prepared for the Propane Education & Research Council, http://www.npga.org/wp-content/uploads/2018/02/2015-Propane-Industry-Impact-on-US-and-State-Economies-FINAL.pdf.