Eco-cities are cities designed to be good for the environment. They have plans in place to help protect the air, water, and animals. Eco-cities use clean energy like solar panels and wind turbines, to help reduce the pollution cause by burning coal or gas. They have special places for plants and animals so they can have homes and be safe, and they also plan their cities so that people can walk and bike safely. Eco-cities also make sure their water is clean and safe to drink, and they make sure to recycle as much of their waste as possible, so they don't waste resources.