"Poison gas" is a term used to describe gases that are harmful or toxic to humans and other living beings. These gases can cause sickness, injury, or even death if inhaled or exposed to for a certain period of time. Full definition
The G7 meeting is the first high - level gathering of the allies since the United States, France and Britain launched 105 missiles targeting chemical weapons facilities in Syria in retaliation for a suspected poison gas attack on April 7. (cnbc.com)