Data:
https://datausa.io/profile/geo/kern-county-ca/
Images:
https://www.nytimes.com/2014/07/08/us/california-drought-chevron-oil-field-water-irrigation.html
https://www.theguardian.com/cities/2017/feb/14/bakersfield-california-bad-air-pollution-us
http://kedc.com/kern-no-6-for-americas-strongest-farming-and-agribusiness-regions/
http://susanreep.com/blog/2010/03/kern-county-oil-and-ag-thats-us/
Academic and Media Sources:
http://redgreenandblue.org/2018/06/16/green-california-jerry-brown-black-oil/
http://scorecard.goodguide.com/env-releases/def/cwa_source_class_def.html#agri