That's "for the prevention of thermal runway". This study is talking about how to _prevent_ fires. We're talking about fires that have already started here an

That's "for the prevention of thermal runway". This study is talking about how to _prevent_ fires. We're talking about fires that have already started here and are raging out of control and consuming the car. The battery verification tests confirmed that aqueous agents were most effective for the prevention of thermal runaway propagation. For the lithium-ion cell chemistries tested, none of the handheld agents at their recommended application distances were able to prevent propagation. The lithium-metal battery tests revealed that, without suppression, the cells would propagate into thermal runaway. To stop propagation, 500 mL of the aqueous agents were sufficient.