Put in concentrated solar parks and ship the green electricity via high-voltage lines to the rest of Europe.

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Given the gloom, continued ship-building will only put off the day when the world's lines make serious money again.

ECONOMIST: Shipping

Each Oasis-class ship utilizes shape recognition cameras, smart cards, 900 wireless access points and other digital technologies to eliminate lines in experiences ranging from dining and onboard activities to excursions.

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