In this case, you'll have to become your own hero, so learning some basic safety and survival tricks is absolutely crucial. Do you know, for example, why you should never use bleach and cleaning products that contain ammonia at the same time and in the same room? Or why the smell of urine or fish at home, for no apparent reason, should set off alarm bells in your head? You don't? So here's a list of facts that can help you act rationally in a critical situation.

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