| Environmental protection in literature. Matches 18 items |
| Environmental protection in literature -- Congresses. Matches 1 item |
| Environmental protection -- International cooperation. Matches 2 items |
| Environmental protection -- International cooperation -- Congresses. Matches 1 item |
| Environmental protection -- Juvenile fiction. Matches 5 items |
| Environmental protection -- Juvenile literature. Matches 3 items |
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Environmental protection -- Law and legislation. SEE: Environmental law Matches 5 items
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Environmental protection -- Law and legislation -- Economic aspects -- United States. SEE: Environmental law -- Economic aspects -- United States. Matches 1 item
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Environmental protection -- Law and legislation -- United States. SEE: Environmental law -- United States Matches 8 items
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| Environmental protection -- Moral and ethical aspects. Matches 1 item |