Although choosing which section of a quote to abbreviate for a student paper or published article is up to editorial discretion (ie, it's up to you), you must be careful not to influence the meaning of the quote in any way.  To make sure you aren't changing the meaning, choose words that are not essential to understanding a quotation. Leave verbs and new subjects alone, but take out words that are already understood by the reader. In other words, it's permissible to remove phrases that are redundant or repetitive. For example, here is another Charles Dickens quote, this time from the novel Our Mutual Friend: "I cannot help it; reason has nothing to do with it; I love her against reason." Here is the quote with a redundant phrase removed: "I cannot help it ... I love her against reason." Write out the full quote and study it to determine which parts may not be necessary. Then use a highlighting tool to select these words and phrases. Read the quote aloud, omitting these highlighted words.  If you can tell that you have changed the meaning, work with the highlighted areas until you have preserved the original meaning of the quote. For example, if you were working with the above quote, the bolded words are marked for removal: "I cannot help it; reason has nothing to do with it; I love her against reason." Once you have studied the quote and selected passages to omit, go ahead and delete or erase them. In place of the removed section(s), write an ellipsis.  If the removed section leaves the quote grammatically incorrect, add a word or short phrase that bridges the gaps in square brackets [ ] after the ellipsis. For example, it would look like: "She played in the sun ... [but] hated it." If you have determined it is possible to delete the rest of a sentence or a whole sentence, you need to add the period that would have been there after the ellipsis. The ellipsis would then look like it has four dots.  Remember that an ellipsis has only three dots. The fourth dot is always a period. Begin the next part of the quotation with a capital letter if it is the beginning of a new sentence. For example, if you were quoting from the same passage as the Dickens quote in this method, you would take out the sentences we used above and leave the sentences around it like this: "To enlighten [human Justice] with the lights of a stone passage, a flight of stairs, a brown window-curtain, and a black man .... What a use for the money, and how worthy of its old misuses!"
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One-sentence summary -- Choose a section of the quote. Study the quote. Create the ellipsis. Add a period when you delete a sentence.

Article: Dark colors attract heat. Painting your house (particularly your roof) white can naturally reduce how hot your house gets and how much you need to spend on air conditioning.  A study by the Lawrence Berkeley National Laboratory’s heat Island group found that in warm weather houses with white roofs required 40% less energy for cooling than those with black roofs. Some appliances, like your oven, dishwasher, and dryer, will create heat that permeates throughout the house. Try to use these at night to reduce the need for air conditioning during the warmest part of the day.  Alternatively, use a crockpot or microwave oven, which don’t produce as much as heat as an oven.  Grilling outside is also a good way to cook without heating up your home. Your air conditioning can be extremely inefficient if it is not working properly. You can call a repair company for a consultation or do a bit of due diligence on your own.  Your AC can use too much power if it isn’t appropriately sized for your home. Window units, for example, are only intended to cool a single room. Consider purchasing a new AC system. A new, high-efficiency system uses roughly half as much energy as 15-year-old system. You can personally check to see if an outside unit or heat pump is being blocked by anything. This can significantly increase your energy costs. A dirty AC filter can make it harder for your AC to pump air, increasing energy costs. Dirty filters can also cause your AC to break down prematurely, further increasing your expenses. You should try to change the filter once a month. Consider purchasing a permanent filter. These only need to be washed periodically. At a price of $20 to $40, you will recoup the cost of a permanent filter in about a year. If airflow is blocked in your home, your air conditioning system will work overtime to cool down the hard to reach places. Use a fan and verify that nothing is blocking the flow of air through your house.  A fan doesn’t exactly cool your home, but by pushing air around, it will distribute the heat better.  Keep vents open. You might have forgotten that you closed a vent in your house. If so, your AC will keep on running to little or no effect.  Keep doors open. If you do not, the air will not circulate properly. One good way to keep your home warm is to prevent the heat from coming in to begin with. This can involve some small home repairs, but often it just requires simple lifestyle changes.  Check for leaks in your weather stripping around your doors and windows, as well as holes around pipes and the circumference of your garage floor. Use caulk to close up any holes.  Your home can get especially hot if you allow the sun in. Close your blinds during the middle of the day to keep your home cool. Insulation in your attic floor should be approximately 12 inches thick.  Do not put boxes on it or walk over it frequently, because this will compress the insulation and make it less effective. Raising the temperature in your home by 2°C can reduce cooling costs by 5%. Wear lighter clothes (or none) to acclimate to a slightly higher temperature. Turn the AC down when you leave the house.  Purchase an automatic thermostat that will turn off when your house cools down. The EPA estimates that a programmable thermostat can save you as much as $180 per year; such thermostats cost as little as $25.  Keep heat-producing appliances like lights away from the thermostat; these can throw off its readings. Refrain from mopping, washing dishes, and washing clothes during the height of the day’s heat. These tasks produce moisture, which will make the house feel humid and uncomfortable.
Question: What is a summary of what this article is about?
Paint your house light colors. Use appliances that produce heat during the night. Check your air conditioning system. Change your filter monthly. Distribute your cooling consistently. Insulate your home from the heat. Love the heat.