But in the tanks, that chemical became an explosive gas.

The flame in his Davy lamp turned blue indicating explosive gas.

So they had to use hydrogen, one of the most explosive gases known.

Nor did they know that highly explosive gas was gathering overhead.

On Monday, the scientists said they had detected an increased level of potentially explosive gases.

The radiation produces heat and breaks some chemicals down into explosive gases.

The vapor mixed with oxygen in the air to form a highly explosive gas.

As a result, explosive gases were allowed to build up.

These containers carry explosive natural gases that can be used as weapons.

Their only known power is explosive gas from the fingertips.