Because, although "dangerous", lemons can't really harm you for life. It can't really kill you unless you actually try, and even if you did all I can think that it could do is blind you if you're really unlucky.
Also lemons are fruit. It would be strange if they put warning labels on them.
The oxidizing hazard symbol means the substance has the ability to react with oxygen, usually dangerously.
In many countries it is a legal requirement to use signs as a warning of dangerous substances, such as corrosive acid or poisonous materials. Many science laboratories use such substances in testing or development, and therefore usually use protective gear or other safety equipment. The signs is intended to warn others of the potential hazard inside the laboratories if safety precautions is not followed.
physical hazard
That red flag is a warning sign. The cat is warning the puppy.
Sunlight is not considered an environmental hazard
a lemon doesent have a hazard sign because it is a natural thing
A hazard is a warning to people(s) that by doing something to a object it could cause a disaster. Eg. a hazard warning on a door. by going in you could get radiation poisoning, leading to a disaster. or if there is a hazard warning for a area and it then escalates causing a disaster ( winds pick up and turn into a twister).
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It is part of the hazard warning module at the back of the switch
If you are talking about the flasher is is part of the hazard warning module If you are talking about the flasher is is part of the hazard warning module
An Animal Hazard is a warning of what the animal may do, or what not to do with the animal. For example: "Animal Hazard: Never let snakes roam freely indoors." or "Animal Hazard: Never hold a bunny on it's back." Anyway an animal hazard is to help you and the animal stay safe! hope this helps :)
because of safety
Part of the hazard warning module
Colors
The hazard symbol warning of a flammable liquid looks link a stylized flame.
Incorporated in the hazard warning module part of the hazard switch