CS gas, a riot control agent also known as tear gas, is a chemical compound that can render people temporarily unable to function by irritating the eyes, nose, mouth, lungs and skin, according to the US Centers for Disease Control and Prevention. The use of riot control agents in warfare is prohibited under the United Nations’ Chemical Weapons Convention.
There have been periodic reports of Russian soldiers using gas across the battlefield in recent months, yet its use around Orikhiv appears to be abnormally persistent.
https://amp.cnn.com/cnn/2023/12/19/europe/ukraine-soldiers-russia-frontlines-cmd-intl/index.html
