Why not order a dangerous chemical producing source, a highway, closed?

He said there were no dangerous chemicals in the area of the explosions.

He had tried not to think of his responsibility for these dangerous and unstable chemicals.

He added that testing showed no dangerous chemicals in the air.

So why are we still using these potentially dangerous chemicals?

People handled the dangerous chemicals without concern for their own safety.

"Some of the most dangerous chemicals known are found in nature."

Most dangerous chemicals are only used by scientists who have had special training in how to handle and use them.

The same treatment is needed for other dangerous chemicals as well.

Because of its high reactivity, it is a dangerous chemical.