▁from ▁the ▁air , ▁which ▁exclude ▁o xygen ▁and ▁ex ting u ish ▁the ▁fire . ▁Because ▁of ▁this , ▁the ▁risk ▁of ▁fire ▁in ▁a ▁space craft ▁is ▁small ▁when ▁it ▁is ▁coast ing ▁in ▁in ert ial ▁flight . ▁This ▁does ▁not ▁apply ▁if ▁o xygen ▁is ▁supplied ▁to ▁the ▁fire ▁by ▁some ▁process ▁other ▁than ▁thermal ▁con ve ction . ▁ ▁Fire ▁can ▁be ▁ex ting u ished ▁by ▁removing ▁any ▁one ▁of ▁the ▁elements ▁of ▁the ▁fire ▁t etra hed ron . ▁Consider ▁a ▁natural ▁gas ▁fl ame , ▁such ▁as ▁from ▁a ▁st ove - top ▁burn er . ▁The ▁fire ▁can ▁be ▁ex ting u ished ▁by ▁any ▁of ▁the ▁following : ▁ ▁turning ▁off ▁the ▁gas ▁supply , ▁which ▁removes ▁the ▁fuel ▁source ; ▁ ▁covering ▁the ▁fl ame ▁completely , ▁which ▁sm oth ers ▁the ▁fl ame ▁as ▁the ▁comb ust ion ▁both ▁uses ▁the ▁available ▁ox id izer ▁( the ▁o xygen ▁in ▁the ▁air ) ▁and ▁disp laces ▁it ▁from ▁the ▁area ▁around ▁the ▁fl ame ▁with ▁CO 2 ; ▁ ▁application ▁of ▁water , ▁which ▁removes ▁heat ▁from ▁the ▁fire ▁faster ▁than ▁the ▁fire ▁can ▁produce ▁it ▁( similar ly , ▁blow ing ▁hard ▁on ▁a ▁fl ame ▁will ▁dis place ▁the ▁heat ▁of ▁the ▁currently ▁burning ▁gas ▁from ▁its ▁fuel ▁source , ▁to ▁the ▁same ▁end ), ▁or ▁ ▁application ▁of ▁a ▁ret ard ant ▁chemical ▁such ▁as ▁Hal on ▁to ▁the ▁fl ame , ▁which ▁ret ards ▁the ▁chemical ▁reaction