Trees and other plants make our world look beautiful, but did you know that plants use their leaves to help keep the air clean and safe for us to breathe? This book takes readers step-by-step through a clear, grade-appropriate explanation of how plants remove carbon dioxide from the air during photosynthesis. Readers will also learn how plants can even remove harmful chemicals from the air in our homes. Filled with information perfectly suited to the abilities and interests of an early elementary audience, this colorful, fact-filled title gives readers a chance not only to learn, but also to develop their powers of observation and critical thinking. From beautiful photographs to high-interest facts, this book makes learning about the amazing air-cleaning properties of plants, a lively and engaging experience.