https://www.jacobinmag.com/2019/04/workers-memorial-day-workplace-deaths
https://www.usnews.com/news/national-news/articles/2019-04-29/report-us-renewable-energy-production-set-to-outpace-coal-in-april
https://www.nytimes.com/2019/04/30/business/energy-environment/tesla-solar-energy.html
http://www.ibew.org/media-center/Articles/19Daily/1904/190425_IllinoisBans
http://www.ibew.org/media-center/Articles/19Daily/1904/190424_IBEWFounders