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http://www.arborday.org/
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trees
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Features plants from temperate climates worldwide. Includes class information and online forums plus overview of research into plant adaptation, genomics, and conservation.
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plants
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botany
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botanical
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nature
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eNature: Your Guide to America's Wildlife -- Comprehensive, Accurate, and Local, now including the ... ©2007 eNature.comSite Map User Settings About Us/Contact ...
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nature
science
animals
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wildlife
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plants
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Official site of the EPA, the U.S. federal agency whose mission is to protect human health and safeguard the natural environment.
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environment
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Source for authoritative conservation information on more than 50,000 plants, animals, and ecological communities of the United States and Canada.
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nature
biology
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science
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animals
encyclopedia
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Information and inspiration on gardening with answers to questions about lawns, landscapes, trees, shrubs, perennials, annuals, vegetables, herbs and flowers, ...
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gardening
garden
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plants
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planting
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Providing the public with new, locally relevant information on environmental issues in their own states, home towns, and neighborhoods.
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environment
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activism
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organic
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Featuring articles and links about organic gardening.
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sustainability
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diy
urban
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