Penthebubble

From Penthesilea

[edit] my feminine side

1. A hollow globule of gas.
2. A speculative scheme that depends on unstable factors that the planner cannot control; "his proposal was nothing but a house of cards"; "a real estate bubble".
3. An impracticable and illusory idea; "he didn't want to burst the newcomer's bubble".
4. A dome-shaped covering made of transparent glass or plastic.

• A system under which existing emissions sources can propose alternate means to comply with a set of emissions limitations; under the bubble concept, sources can control more than required at one emission point where control costs are relatively low in return for a comparable relaxation of controls at a second emission point where costs are higher.

• Gaseous inclusion in the glass, generally spherical in the melt but may be deformed in various ways during feeding or fabrication. The shape can be qualified by a suitable adjective(e. g. spherical, elliptical). The content, if known, can also be similarly denoted.