1.   Black smoke poured out of the engine.

2.   Everyone was looking ahead, where a stick of black smoke stood on the horizon like a factory chimney.

3.   Offshore a small tug belched black smoke as she struggled to pull a string of barges.

4.   Rolling clouds of black smoke blotted out the sky while brilliant sheaths of flame slithered out of every window.

5.   The boiler was puffing thick black smoke.

6.   The bus left a trail of black smoke behind it.

7.   The house was still burning, pouring forth thick black smoke.

8.   The main stack belches out clouds of black smoke.

9.   The only traffic in the whole area consisted of chugging yellow Navy tugboats which emitted heavy black smoke from their tall stacks.