The water, oil and gas from a well often contains radon.

The gases and fluids contained about 40 parts of gold per billion.

This was the cause for the presence of carbon dioxide and other gases contained within the lake.

As the gas contains a lot of carbon monoxide, it is a valuable fuel.

America is virtually the world's only source of natural gas containing 0.3 percent or more of helium.

But what if these gases contained something else?

The resulting gas contains significant amounts of byproducts and requires purification.

As this gas contained a significant amount of carbon monoxide, the gas was quite toxic.

First, the inert gas contained inside of the glass tube is ionized by a voltage.

Patients inhale a gas containing small particles of technetium surrounded by carbon.