Suppose, for example, one were deciding where to set a global ceiling on emissions.
Indeed, in five days of sometimes acrimonious debate, the OPEC ministers seemed totally bogged down, unable to agree on a global production ceiling or individual national limits that might restore oil prices.
One of the biggest transformative signals that 195 governments sent to energy markets via the Paris agreement at the weekend was a goal for the global warming ceiling to be set well below 2C, and as low as 1.5C if possible.
Or is there a "global glass ceiling"?
Last week, the country's environment and climate change minister endorsed a 1.5-degree global warming ceiling — noticeably tougher than the two-degree target most nations are striving for, and which the United Nations has already said they won't meet.
IPs paid by DRG in a global budget ceiling does not required referral.
Inpatient services paid by Diagnostic Related Group within a global budget ceiling, which is estimated based on unit costs, admission rates and admission profiles, contained cost effectively.
Most of the ships measure air and dew-point temperature, bulk water temperature, relative humidity, air pressure, relative and true wind speed and direction, global radiation, visibility, ceiling, salinity and rain gauge data.
We will be guided by them," Mr Obama said, a reference to the record of the Bush White House, which queried the link drawn by scientists between climate change and human activity and resisted calls for a global regime of emissions ceilings.
Aussie rules, rugby league and touch footy, by dint of their limited global appeal, have a ceiling.
Environmental groups and their foes in industry joined hands to embrace the approach, a market-driven system that sets a ceiling on global warming pollution while allowing companies to trade permits to meet it.
