<human>:  How can I make my house more energy-efficient?
<bot>: One way to make your house more energy-efficient is to upgrade your insulation. Investing money in higher-quality insulation for your walls and attic can help you reduce your energy costs. Additionally, you can install energy efficient windows and doors to help keep cool air inside during summer and warm air inside during winter. Upgrading your appliances to higher-efficiency models is also a great way to reduce energy costs. Finally, ensuring that all of your lights, electronics, and appliances are turned off when you are not using them can go a long way towards improving the energy-efficiency of your home.