# AI 建议在火山灰降落期间用湿布遮住口鼻（灰堵塞孔隙导致窒息）

- **ID:** `disaster/volcanic-ash-wet-cloth-myth`
- **领域:** disaster
- **类别:** life_threatening
- **验证级别:** ai_generated
- **修复率:** 78%

## 根因

湿布会迅速被细灰颗粒堵塞，形成不透气屏障，导致呼吸困难并可能窒息。干燥的颗粒过滤口罩（N95或P100）才有效。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| USGS Volcanic Ashfall Guidelines 2023 | active | — | — |
| WHO Health Advisory on Volcanic Ash 2022 | active | — | — |

## 解决方案

1. ```
   Wear a properly fitted N95 or P100 respirator mask. If unavailable, stay indoors with windows and doors sealed, and use a HEPA air purifier. Do not use air conditioning that draws outside air.
   ```
2. ```
   If caught outside without a mask, create a dry, multi-layer cloth covering (e.g., a scarf or shirt) over the mouth and nose, but replace it frequently as it clogs. Seek indoor shelter immediately.
   ```

## 无效尝试

- **** — Assuming that dampening a cloth improves filtration; it actually reduces porosity and increases breathing resistance. (75% 失败率)
- **** — Believing that any cloth is better than nothing; a dry, loosely woven cloth also allows fine ash to pass through. (50% 失败率)