-EPA (2023)- https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2021

- AgSTAR (2023)- Anaerobic Digestion Data and Trends

- Capper, Cady and Bauman (2011)- https://wcds.ualberta.ca/wcds/wp-content/uploads/sites/57/wcds_archive/Archive/2011/Manuscripts/Capper.pdf

- Food and Water Watch and NASA (2024)- https://storymaps.arcgis.com/stories/4b708bdc0d2d419ba34cb352ca79b6e3

-  University of Wisconsin (2022)- https://psc.wi.gov/Documents/OEI/Biogas/WI_Biogas_Case_Studies_Report_2022.pdf

-  Domingo et. al. (2021)-https://www.pnas.org/doi/full/10.1073/pnas.2013637118

-  Holly et al. (2017)- https://www-sciencedirect-com.utk.idm.oclc.org/science/article/pii/S0167880917300701

-  Wyer et al. (2022)- https://www-sciencedirect-com.utk.idm.oclc.org/science/article/pii/S0301479722018588

- Apte at al. (2017)- https://pubs-acs-org.utk.idm.oclc.org/doi/10.1021/acs.estlett.8b00360

-  Zheng et al. (2019)- https://www.mdpi.com/2073-4433/10/7/411#:~:text=A%20total%20of%2049%20compounds,Freons%20and%203%20sulfur%20compounds.

-  EPA (2023) https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2021

- Hafner et al. (2021)- https://www.frontiersin.org/articles/10.3389/fsufs.2020.614349/full

-  AgSTAR is a partnership between the USDA, EPA, and DoE to design and promote digesters in agriculture.

- AgSTAR (2012)-  https://www.epa.gov/sites/default/files/2014-12/documents/agstar-handbook.pdf

-  AgSTAR (2014)- https://www.epa.gov/sites/default/files/2014-12/documents/funding_digestion.pdf

-  BioCycle (2022)- https://www.biocycle.net/the-ira-revolutionizes-ad-tax-credits/

- SRAP (2020)-  https://sraproject.org/news-and-events/california-cap-and-trade-program-summary/

-  Smith (2023)- The Value of Methane from Cow Manure

-  Burch et al. (2018)- https://www-ncbi-nlm-nih-gov.utk.idm.oclc.org/pmc/articles/PMC7166490/

-  Nag et al. (2020)- https://www-sciencedirect-com.utk.idm.oclc.org/science/article/pii/S004896971936293X?via%3Dihub

-  D’Onofrio (2023)- https://trace.tennessee.edu/utk_graddiss/8679/

-  Xiao (2016)-https://docs.lib.purdue.edu/dissertations/AAI10181154/

-  Penn State Extension- https://extension.psu.edu/anaerobic-digestion-biogas-production-and-odor-reduction

- Environmental Working Group and Midwest Environmental Advocates (2022)- https://www.ewg.org/research/double-trouble-wisconsins-land-and-water-are-inundated-pollution-animal-manure-and-excess

- Lamolinara et al. (2022)- https://www-sciencedirect-com.utk.idm.oclc.org/science/article/pii/S0956053X21006887

-  Temken et al. (2019)https://pubmed-ncbi-nlm-nih-gov.utk.idm.oclc.org/31196558/

-  Mathewson et al. (2020)-https://pubmed-ncbi-nlm-nih-gov.utk.idm.oclc.org/33095309/

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