Chemical irritants include tear gas and pepper spray, which cause sensations of burning, pain and inflammation of the airways ...

At the height of the protests and disorder in Tehran on Saturday and Sunday, Twitter was used to give graphic accounts to a worldwide audience - even if they were a maximum of 140 characters.

Tear gas usually refers to 2-chlorobenzalmalononitrile (agent CS) or chloroacetophenone (agent CN), which work by activating pain receptors in the eyes, nose, mouth, and lungs.

Scientists say the world needs to cut greenhouse gas emissions by about 43% from 2019 levels by 2030 to meet the 2015 Paris Agreement's goal of keeping warming to less than 2 degrees Celsius (3.6 ...

Russia using chemical weapons in Ukraine should make headlines, but when the agent involved is tear gas, it tends to be apostrophized as a “chemical weapon” and treated as a non-story.

On the night of June 2, 2020 — infamous to locals as “Tear Gas Tuesday” — Portland Police fired nearly 150 “tear gas” munitions across a tight area of downtown. The CS gas deployed ...