运河有毒化学物质泄漏引发重大事件

英国沃尔索尔运河中发现氰化钠，这种化学物质对健康构成严重威胁，导致重大事件发生。

## Original Title: Major incident over canal toxic chemical spill

## Article Content:

Sodium cyanide, which can pose a serious health risk, is discovered in the canal in Walsall.

Original article: https://www.bbc.com/news/articles/c5yk7nd8r9do