The basic principle of wet oxidation has been known for over 75 years; the first patent concerning this process dates back to 1912. Until the middle of the last century. wet oxidation was not used in the field of waste disposal. but only in the scope of chemical processes. https://atzbota8hcqy.collectblogs.com/79712210/environmental-protection-tax-and-total-factor-productivity-evidence-from-chinese-listed-companies