Our natural resources
environmental science - conservation
Our rough guess is there are 40,000 words in this book.
At a pace averaging 250 words per minute, this book will take 2 hours and 40 minutes to read. With a half hour per day, this will take 6 days to read.
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This book will take an estimated to read at a reading speed averaging words per minute. With 30 minutes per day, this will take to read.
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