101.   Sarin gas is an organophosphate.

102.   Some greenhouse gases are naturally occurring, such as carbon dioxide, but increase in the environment when we burn gasoline in cars, for example, or wood.

103.   Some scientists had thought the halo gases were much cooler.

104.   That night we brought home a take-out dinner of cold borscht and a club sandwich in case the gas was still out.

105.   The analysis showed that the gas-fired chillers were less efficient, but that gas was a cleaner source than electricity generated by coal and oil.

106.   The company said increased sales of oil and gas were offset by lower prices fir the commodities.

107.   The cyanide gas also is less deadly than sarin.

108.   The diluted gas is essentially re-burned, altering its molecular structure, and the altered gas is exposed to a catalyst that scrubs it of remaining carbon monoxide.

109.   The engine needed to run long enough to turn the cooling fans on, and there was no gas.

110.   The dominant greenhouse gas is carbon dioxide, caused by the burning of fossil fuels like coal and oil in power plants and vehicles.