1.   A special licence is required for the manufacture or handling of any dangerous chemical.

2.   In addition, it seems no public warnings were issued about the addition of this potentially dangerous chemical.

3.   New guidelines on how to move dangerous chemicals by road have just been published.

4.   No scientist is careless enough to handle dangerous chemicals or substances without suitable protection.

5.   There are strict rules about the use of dangerous chemicals.

6.   These new industrial cleaners are much lower in ammonia and other dangerous chemicals than before.

7.   The factory faced serious fines for releasing dangerous chemicals into the river.

8.   Birch argued that the government was avoiding informing the public that it allowed companies to discharge dangerous chemicals and heavy metals directly into rivers.

9.   A drum of dangerous chemicals has been stolen from a factory store.