Each contains one or more puzzles, which must be solved to get access to the exit.

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Somehow this funding issue must be solved either through higher taxes or lower benefits.

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There has been a lot of media hand wringing recently about all the difficult problems that must be solved in order to close Guantanamo.

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The social issues which have been neglected must be solved urgently.

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They must be solved by all of us coming together.

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Moreover, a strictly price-based comparison between clean and dirty energy ignores many of the other non-market barriers that must be solved for clean energy to adopted on a meaningful scale, such as regulatory and infrastructure hurdles, issues with intermittency, technology risk, and other barriers.

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Peripheral countries must stop expecting the ECB to come up with solutions to problems that should be solved by governments, he added.

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The agreement solved the immediate issue of redeployment and laid out a roadmap for the next steps that must be taken to fulfill existing agreements, and to move ahead to the pivotal questions of the future.

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