11.   Experts find it difficult enough to predict how temperature and climate will change globally if industrial society continues to emit greenhouse gases like carbon dioxide.

12.   This abbreviation stands for polyvinyl chloride, a particularly unstable kind of plastic that emits gases that damage photographs.

13.   Is urea formaldehyde foam insulation slowly emitting noxious gas through cracks in the walls?

14.   Midocean ridges are continually emitting the gas, Kirschvink said.

15.   Newer carpets can emit chemical gases, he said, adding that most carpets sold today carry emission information on their labels.

16.   Others, like AEP, say the treaty should give businesses the option of trading the right to continue emitting gases in return for cleaning up the air elsewhere.

17.   Pregnant or breast-feeding women may also want to avoid buying new wall-to-wall carpet or synthetic wood furniture because the products emit gasses that may be absorbed.

18.   Store them away from apples, which emit ethylene gas that can cause the bulbs to break dormancy.

19.   That lure of carbon dioxide makes sense biologically because both rotting wood and termite colonies emit the gas in the right concentration.

20.   The gas is emitted from radium, found in many mines, that oxidizes as it ages.