Symbols to regulation of environmental security: what is it, what is?

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3 class in the classroom the outside world is given by the following definition of the conventional signs to the rules of environmental safety is a simplified representation of rules to protect people from the harmful effects of the polluted environment.\r\n\r\primary the rules of environmental safety with their conventional signs are:\r\n\r\n1.Do not stand near running engines of cars\r\n\r\n\r\n\r\n2.Are not in places where Smoking\r\n\r\n \r\n\r\n3.It is impossible to collect mushrooms and berries near roads\r\n\r\n\r\n\r\n4.It is impossible to fish in contaminated waters and to use it for food
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