article_snippet: The global chemical weapons .
article_snippet: The OPCW's fact-finding mission last year found that the . use of chlorine gas is 'systematic' in the four-year Syrian .
article_snippet: the chemical weapons programme has been eliminated is . continuing.
article_snippet: disturbed' by the reports of renewed use of chlorine gas, last . used widely in World War One.
article_snippet: The use of industrial chemicals as weapons is banned under .
article_snippet: the 1997 Chemical Weapons Convention.
article_snippet: Medics posted videos of children suffering what Medics said . was suffocation, which could be caused by a number of toxic .
article_snippet: agents, including chlorine.