Which of the following is NOT a way to be exposed to chemical hazards?

The option related to observation is not a way to be exposed to chemical hazards because it does not involve physical interaction with the chemicals themselves. Exposure to chemical hazards typically requires a direct pathway where chemicals enter the body.

Here is a breakdown of the other options:

• Ingestion involves taking in chemicals through the mouth, which can lead to poisoning or other toxic effects if the substance is harmful.

• Absorption refers to the process where chemicals penetrate the skin and enter the bloodstream, which can occur with certain hazardous materials.

• Injection occurs when chemicals are introduced directly into the body through an open wound or through the skin with a needle. This method can lead to immediate and severe health risks.

In contrast, observation does not involve any physical contact or interaction with hazardous substances and therefore cannot constitute exposure.