Why should you never rely on your sense of smell alone to judge whether a hazardous material nearby is dangerous?

Pick an answer

1. Some hazardous gases are odorless or dull the sense of smell, so the absence of a smell doesn't mean it's safe
2. Smell is always a reliable warning for every hazardous material, so the absence of an odor means it's safe
3. Sense of smell has nothing to do with hazmat safety
4. It only matters for materials that are visibly colored

Correct!

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