It be dark, and smelled of the damp stone walls and grain dust.

Given a large enough suspension of combustible flour or grain dust in the air, a significant explosion can occur.

"You must have ignited the grain dust in the silo."

He brushed grain dust from his hands.

Ariel remembered reading somewhere that grain dust could explode if liberally mixed with air.

She tells of the death of her husband, who had been working one day in the grain bin and got covered with grain dust.

It looked like a jet hangar surrounded by drifts of grain dust.

Wind howled even faster across the yard, bringing a horizontal blizzard of grain dust.

Q. Why is grain dust in elevators explosive?

The authorities suspect that grain dust, which is highly volatile, may have caused the first explosion about 11 A.M.