The National Petroleum Council (NPC) conducted a comprehensive study to reassess the character and potential of North American natural gas and oil resources and the contribution that natural gas can make in a transition to a lower carbon energy mix while achieving objectives of environmental protection, economic growth and energy security. This charge demanded a study that assessed environmental, operational, technology, supply, demand, and infrastructure considerations. The effort involved over 400 participants from diverse backgrounds and organizations, 58% of whom are employed by organizations outside of natural gas and oil companies.