![Which of the following are sources to fluorine air pollution?](https://www.gkseries.com/blog/wp-content/uploads/2021/12/Which-of-the-following-are-sources-to-fluorine-air-pollution.png)
Q. Which of the following are sources to fluorine air pollution?
- Coal combustion
- Steel industries
- Phosphate fertiliser manufacturing
- All of the mentioned
Answer: All of the mentioned
Answer: All of the mentioned
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