https://www.eia.gov/
https://www.iea.org/
https://www.opec.org/opec_web/en/
https://petrowiki.org/Category:Glossary
https://www.cmegroup.com/trading/energy/crude-oil/light-sweet-crude_quotes_globex.html
https://www.cmegroup.com/trading/energy/natural-gas/natural-gas_quotes_globex.html