English Expression · Intermediate
dirty coal
lignite
Pronunciation: say dirty coal
Meaning
A colloquial term for lignite or coal with high sulfur content, often used to highlight its environmental impact.
Example
The article used the phrase dirty coal to describe lignite.
The article used the phrase dirty coal to describe lignite.
Practice tips
- Practice dirty coal out loud — read the pronunciation guide above and repeat.
- Use it in your own sentence today; reuse beats rereading.
- Pay attention to context: this English expression is for intermediate-level learners.