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China
Practice Relating to Rule 76. Herbicides
In 1972, the head of the Chinese delegation to the Meeting on Human Environment condemned the United States for having caused “unprecedented damage to the human environment” in South Vietnam through the use of “chemical, toxic and poisonous gas”, having as a consequence to poison “rivers and other water resources”. 
China, Address to the Meeting of Human Environment on Our Government’s Position on the Protection and Improvement of Human Environment, 10 June 1972, Selected Documents of the Chinese Delegation to the United Nations, The People’s Press, Beijing, 1972, pp. 257–258.
In 1980, the Government of China denounced actions taken by Israel and accused it of having “inhumanely sprayed defoliant on Palestinian lands”. 
China, Statement on the Issue of Human Rights in the Israeli Occupied Territory, 12 November 1980, Selected Documents of the Chinese Delegation to the United Nations, World Knowledge Press, Beijing, 1980, p. 97.