<human>:  How can I make my backyard more energy efficient?
<bot>: One way to make your backyard more energy efficient is to install solar panels on your roof or invest in a solar powered outdoor lighting system. You can also plant trees and other vegetation that can provide shade for your backyard and lower the overall temperature of your outdoor space. Additionally, you could use a rain barrel to capture runoff from your roof and use it to water your plants and lawn. Finally, you may want to investigate ways to insulate your home and your backyard to help reduce energy loss.