<human>:  How does one keep their house cool in summer without air conditioning?
<bot>: One way to keep your house cool in the summer without air conditioning is to block out the sun's rays by using window treatments such as heavy curtains or blinds. This will prevent the sun's heat from coming in and will keep your house cool during the day. Additionally, fans and open windows can be used to circulate air and cool down your home. During the night, you can also open your windows to allow for cooler air to enter your home.