- - Opening on an environmentalist's agenda?
- - Opening for an E.P.A. worker?
- - High-level opening?
- - Bad opening for environmentalists
- - opening up?
- - depletion of a certain form of global protection
- - Seasonal thinning in the atmosphere over Antarctica
- - Problem linked to CFC's
- - Polar environmental concern
- - Montreal Protocol concern
- - High-level breakdown?
- - Depleted layer in the atmosphere near the poles
- - Antarctic environmental concern
- - Atmospheric problem
- - old region sounds complete environmental problem
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- [ Other definitions ]