1. Act from 14 December 2012. Act on Waste. Journal of Laws 2012, item 21. https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=wdu20130000021 (in Polish).
2. Act from 20 July 2017. Water Law. Journal of Laws 2017, item 1566. https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20170001566 (in Polish).
3. Act from 27 April 2001. Environment Protection Act. Journal of Laws No. 62, item 627. https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=wdu20010620627 (in Polish).
4. Almeida, T. A. B., Montenegro, A. A. A., de Carvalho, A. A., & Tabosa, J. N. (2021). Soil and crop spatial variability in maize irrigated with domestic effluent. DYNA, 88(219), 111-117. https://doi.org/10.15446/dyna.v88n219.92874
5. Ariņa, D., & Bendere, R. (2011). The estimation of the emission of greenhouse gasses by the treatment of sewage sludge in latvia. Paper presented at the Research for Rural Development, 2, 214-217.