Here are a few options for descriptions for a WordPress post tag titled “甲烷” (Methane) in Traditional Chinese, ranging from simple to more descriptive, along with the reasoning behind each:

**Option 1: Simple & Direct**

* **Description:** 甲烷，一種溫室氣體。 (Methane, a greenhouse gas.)
* **Reasoning:** Concise, accurate, and immediately relevant. This is ideal if the focus is on SEO and brevity.

**Option 2: Expanded Basic Information**

* **Description:** 甲烷 (CH₄)，天然氣的主要成分，也是重要的溫室氣體。 (Methane (CH₄), the main component of natural gas, and a significant greenhouse gas as well.)
* **Reasoning:** Provides a bit more background information, including the chemical formula, to inform the reader. Directly links it to natural gas.

**Option 3: Environmental Focus**

* **Description:** 探討甲烷的排放源、氣候影響及減排措施。 甲烷是重要的溫室氣體。 (Exploring methane’s emission sources, climate impacts, and mitigation measures. Methane is a significant greenhouse gas.)
* **Reasoning:** Focuses on the environmental aspects, which are likely the primary concern for most users searching for information about methane. It sets expectations by mentioning specific aspects.

**Option 4: Detailed & Contextual**

* **Description:** 了解”甲烷”的科學定義、在環境中的作用，以及相關的氣候變化議題， 包含甲烷的來源，如農業、能源生產，以及減緩甲烷排放的方法。 (Understanding the scientific definition of “Methane”, its role in the environment, and related climate change issues. This includes sources of methane, such as agriculture and energy production, as well as methods for mitigating methane emissions.)
* **Reasoning:** Provides a more comprehensive description suitable if you plan to use the tag for a variety of content related to methane, and if you want it to act as an introductory summary. It clearly outlines the scope of the tag’s content.

**Option 5: SEO-Focused (targeting keywords)**

* **Description:** 甲烷排放, 溫室氣體, 天然氣，氣候變化，減碳措施 (Methane emissions, greenhouse gas, natural gas, climate change, carbon reduction measures)
* **Reasoning:** This is not a description, but a list of keywords that can be used as a description. The most relevant keywords for the topic. This is useful for search optimization, making it more likely that the tag is found by search engines.

**How to choose the best option:**

* **Content Focus:** What is the primary topic of posts tagged with “甲烷”?
* **Target Audience:** Who are you writing for? (e.g., general public, scientists)
* **SEO Goals:** Do you want to attract readers searching for specific information?
* **WordPress Theme:** Does your theme’s tag display handle longer descriptions well?

I recommend Options 2 or 3 as good starting points. You can always modify the description later. Be sure to use the Description field when editing the tag in WordPress.

To add a description in WordPress:

1. Go to **Posts > Tags**.
2. Find the “甲烷” tag and click “Edit”.
3. In the “Description” box, enter the chosen description.
4. Click “Update”.