The Shadow's coffer had delivered an explosion of tear gas - harmless unless received directly, but certain in its purpose.

The theory holds that a buildup in the atmosphere of carbon dioxide and certain other gases will cause the earth's surface to warm.

The individual units of ground stations often use an infrared detector to assess the concentration of a certain gas.

Radiation somehow generated a current in certain gases.

Carbon dioxide and certain other gases trap solar heat in the atmosphere.

The greenhouse effect occurs when certain gases in the atmosphere (the air around the Earth) trap infrared radiation.

It is not possible to state that a certain gas causes an exact percentage of the greenhouse effect.

The judge issued a statement yesterday saying: "My financial holdings include certain gas and oil companies.

The oil also prevented the corrosion that could occur in certain gases.

It is known that the increased emission of certain gases is linked to global warming.