Green spaces in urban setting serve many important functions. They provide healthy recreational spaces for individuals, families and communities. They enhance the esthetic appeal of neighborhoods. Trees are critical components of climate modulation and they aid with air, water, and sound pollution. They provide food for many different types of creatures. Native trees are particularly important. Trees are important economic drivers. For these reasons the term Green Gold is used to highlight the enormous importance of our green spaces. Green cities are becoming increasingly popular. Environmental protection and environmental justice are necessary for ethical and sustainable development.