| http://www.w3.org/ns/prov#value | - We continue with our Earth Day campaign - 41 Reasons to Plant a Tree for Your Book, where we share with you 41 reasons provided by readers in celebration of the upcoming 41st anniversary of Earth Day!With more than 180,000 trees planted so far on behalf of readers, authors and publishers working with Eco-Libris, it is no surprise that we think planting trees to green up books is a great idea..
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