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When vacationers purchase coach-class plane tickets, airlines often offer an "upgrade" to economy-plus seating for an additional fee. Because the extra space taken by economy-plus seats reduces the number of passengers that a flight can carry, forgoing this option can send a message to airlines to seat more passengers on their planes and reduce per-passenger emissions.
Go Green and Save Money Anonymous USA Today; Dec 2009; 138, 2775; Docstoc pg. 6 Reproduced with permission of the copyright owner. Further reproduction prohibited without permission.
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