He had had to force himself to ask the question; his mouth seemed full of choking dust.

The two tumbled down through rock and choking dust, plunging into darkness.

He looked round, coughing in clouds of choking dust.

Clouds of choking dust arose in the silvery moonlight around them.

A huge cloud of choking dust blew past him.

He tried to rise, but a second shockwave of choking dust knocked him to the ground.

It had been pulled down in a shower of choking dust.

Dry, choking dust kicked into the air by hundreds of feet.

Fires can be exploded, earth turned to mud, air to choking dust, flesh to stone!

Lanterns hung from the walls, but the tunnel was full of choking dust.