Here are a few description options for the WordPress post_tag “有害物質” (Harmful Substances) in Traditional Chinese, offering different levels of detail and approaches:

**Option 1: Concise & General**

* **Description:** 包含對健康或環境造成危害的物質。 (Contains substances that pose a risk to health or the environment.)

**Option 2: Slightly More Detailed**

* **Description:** 涵蓋各種可能對人類及生態系統產生負面影響的有害化學品、物質或污染物。 (Covers various harmful chemicals, substances, or pollutants that can negatively impact humans and ecosystems.)

**Option 3: Focused on Practical Application**

* **Description:** 標示於文章中提及的任何有害物質，如化學品、毒素、或環境污染物，以提醒讀者注意潜在風險。 (Tags any harmful substances mentioned in the articles, such as chemicals, toxins, or environmental pollutants, to alert readers to potential risks.)

**Option 4: Emphasizing Awareness and Safety**

* **Description:** 關注可能對健康和安全造成威脅的物質。 了解有關有害物質的信息，以保護自己和環境。(Focuses on substances that may threaten health and safety. Learn information about harmful substances to protect yourself and the environment.)

**Consider the following when choosing:**

* **The scope of your blog:** Does your blog have a narrow focus (e.g., home safety) or a broader one (e.g., environmental issues)?
* **Your target audience:** Are you writing for a professional audience or a more general one?
* **Your overall tone:** Do you want to sound informative, cautionary, or educational?

You can tailor the description further to include specific examples relevant to your content, if needed. For example, if your blog frequently discusses lead paint, you could add: “例如：油漆、殺蟲劑、空氣污染物等。” (Example: paint, pesticides, air pollutants, etc.)

Regardless of your choice, make sure the description is clear, concise, and relevant to the type of content you tag with “有害物質.”