For years, residents of Aida refugee camp in the southern occupied West Bank have learned to live with the ever-looming threat of tear gas.

Anas Abu Srour, 29, a coordinator at the Aida Youth Centre who has lived his entire life in the camp, recalled how, as a child, every game had to be prefaced with an exit strategy.

‘From my years of doing this kind of research, it is, in my opinion, unprecedented to use this quantity of tear gas over this length of time’

– Dr Rohini Haar, lead researcher of University of California, Berkeley study