Our local ecosystems provide many ecosystem services that endow us with resources, opportunities for recreation and cultural expression, and support the safety quality of life for all living things, including humans. Street trees perform a number of ecosystem services for both humans and wildlife. They filter our air, provide passive cooling and heating, capture carbon, take up storm water (a vital aspect in cities prone to flooding due to climate change— see our Sustainable Cities module for more information on this topic), reduce noise, provide food, shelter, and provide abundant beauty.