Firefighters are required to check the air supply on their self-contained breathing apparatus each day. If there is any reduction in pressure, the firefighter should change the air tank and replace it with a full tank. The main reason firefighters should have full air tanks is that

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Firefighters are required to check the air supply on their self-contained breathing apparatus each day. If there is any reduction in pressure, the firefighter should change the air tank and replace it with a full tank. The main reason firefighters should have full air tanks is that