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* 1. The first Earth Day was held in 1970.

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* 2. ________ seedlings are planted in the United States each year.

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* 3. What percentage of Americans have access to curbside or drop-off corrugated recycling programs?

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* 4. What renewable resource are corrugated cardboard boxes made from?

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* 5. What packaging material is recycled most often?

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* 6. Today, the United States has 20 percent more trees than it did on the first Earth Day celebration.

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