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Abebooks.com - Offset 5 lbs of CO2 per dollar spent Lonely Planet Travel Guides - Offset 5 lbs of CO2 per dollar spent Barnes & Noble - Offset 5 lbs of CO2 per dollar spent Magazineline.com - Offset 5 lbs of CO2 per dollar spent BOOKSAMILLION.COM - Offset 5 lbs of CO2 per dollar spent Magazines.com - Offset 5 lbs of CO2 per dollar spent half.com - Offset 5 lbs of CO2 per dollar spent Sierra Club - Offset 5 lbs of CO2 per dollar spent Indigo Books & Music - Offset 5 lbs of CO2 per dollar spent StubHub - Offset 5 lbs of CO2 per dollar spent