The report said that radioactive gas within the tunnel was later "purged."

Officials said the search had failed to resolve all discrepancies over how much of the radioactive gas was sent to commercial customers.

The radioactive gas is also used to increase the power of nuclear warheads.

A steam explosion sent a burst of radioactive gas out into the building.

However, if there were such a thing as a radioactive gas, that might be blown about.

Hence the glass in homes could be used to help determine the extent of past exposure to the radioactive gas.

And even if meltdown is prevented, the release of radioactive gases could go on for months.

He knew, then, that nothing but incandescent, radioactive gas remained of the other ship and its crew.

Besides the enemies, Bart must avoid clouds of radioactive gas.

About 1 in every 15 homes has elevated levels of this naturally occurring, radioactive gas.