It's the law: Big EU companies must report on sustainability

https://www.greenbiz.com/blog/2014/04/17/eu-law-big-companies-report-sustainability

https://www.sustainablebusiness.com/europe-passes-historic-law-big-corporations-must-report-on-sustainability-52274/

http://www.europarl.europa.eu/sides/getDoc.do?pubRef=-//EP//TEXT+REPORT+A6-2006-0471+0+DOC+XML+V0//EN

http://www.europarl.europa.eu/sides/getDoc.do?type=TA&reference=P6-TA-2007-0062&language=EN&ring=A6-2006-0471