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2 Read More 69 AFTER STUDENT’SBOOK, PAGE A . Read the article Keeping In the summer it’s important to keep cool. Today, this is not such a big We go inside and turn on the . problem COOL But what did people air conditioner . 1 do to keep cool before there was air 5 ? conditioning In the past, people lived in caves. These caves were deep inside the mountains. The temperature inside the caves stayed about the same all year long. That’s w hy the 10 people did not feel too hot during the . summer Another interesting example of how people At . 2 kept cool comes from Ancient Egypt the people used the mud of the , the time 15 Nile River to build their homes. These houses were cool because the mud walls kept out the heat. In addition, the windows of these houses were built high up so that the heat could escape during the day and 20 . cool air could come in at night Now that we have air conditioning, we no longer need to worry about the summer heat. But we still need to be careful, because air conditioning can be very expensive. So 25 what can we do? Here are some ideas that : will save energy and money Make sure the air conditioner is clean. ºC. 25 Keep the temperature of the air conditioner at Turn off the air conditioner when you go out. 30 מצרים העתיקה / مصر القديمة Ancient Egypt 2 מזגן / مكيّف الهواء air conditioner 1 88


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