1.   A healthy economy helped spark the explosion of decorating shows, which range from impressive to infuriating.

2.   A short circuit alone could not have sparked the explosion because electrical current used inside the tank to measure fuel quantity is extremely low.

3.   Can the movement of fuel in a tank create enough static electricity to spark an explosion?

4.   Firefighters and investigators from Northern States Power Co. were on the scene warning people of the leak and evacuating the area when the explosion was sparked.

5.   Fearing that a methamphetamine lab might have sparked the explosion, officials questioned Freeman about possible chemicals inside the house as paramedics prepared to give him medical aid.

6.   He said investigators know where the fire started, but not what sparked the explosion.

7.   Her ideas have sparked an explosion of debate in areas as diverse as primatology, philosophy and developmental biology.

8.   The local joke at Santa Clara Golf and Tennis Club in California is that there is no smoking allowed on the course for fear of sparking an explosion.

9.   The Navy later recanted, saying that the actual cause may never be known while suggesting that an accidental over-ramming of gun propellant powder could have sparked the explosion.

10.   The result has sparked an explosion in training choices for consumers and a boon for the computer-training industry, with sharp sales growth and steep profit margins.