To add on to tips for dealing with tear gas, I would also suggest carrying half an onion or something else strong smelling with you in protest situations. when

To add on to tips for dealing with tear gas, I would also suggest carrying half an onion or something else strong smelling with you in protest situations. when the gas comes, remain calm. When you feel yourself panicking from the gas, breath through the onion. For some reason, the smell of the onion (in Turkey I've also seen people using lemons) seems to re-center you and mitigate some of the instant psychological effects of the gas (i.e. suddenly you're in a poison cloud).