Forests are complex ecosystems in which plants and animals coexist with one another. Trees are the dominant species in forest ecosystems and are important to maintaining a healthy planet. As the Earth’s great air conditioners, trees rid the air of excess carbon dioxide and other pollutants to improve air quality. Their shade cools the air in summer, and they also filter water, trap particles to make soil and help regulate climate patterns around the world. It is important to understand that in both rural and urban areas, trees provide valuable services that have a direct impact on our lives.