Many international observers believe the Syrian government has used a kind of toxic gas against opposition forces and civilians, White House officials have evidence that the poison used was sarin gas, the Wall Street Journal reports. Syria is widely credited with having a large number of chemical weapons, including around 1,000 tons of nerve gas.
Responding to this threat, the demand for gas masks in Israel has increased dramatically in recent years- 62 percent of Tel Aviv residents now have a safety gas mask kit, according to the reports, while 75 percent of the residents of Kiryat Shmona located near Israel- Syrian borders have a gas mask,
Depending on the type and construction, the gas mask can be effective on various substances, from ordinary dust and pollen to toxic gases – including nerve gas such as sarin pesticides and organophosphates that act on the central nervous system. Paper-filter masks, however, are useless against most chemicals, whether paint fumes, sarin gas, or airborne organophosphates.
Those threats require a mask with activated carbon, also known as activated charcoal. Charcoal bonds with the active ingredients in nerve gas and other chemical threats, effectively filtering those toxic compounds out of the air inhaled by the mask's wearer. Modern gas masks are designed with all such features in order to fight against toxic gas agents.