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1 What is PM2.5 fine dust? Dust is a mixture of solid or liquid compounds floating in the air, the compounds in dust are also known collectively as Particulate Matter – PM symbol. In which, dust particles with microscopic size ( micron ) are best known such as: PM10: Fine dust with a diameter of 2.5 to 10 microns the size of a millionth of a meter. PM2.5: Fine dust less than 2.5 microns in diameter. PM1.0: Ultra-fine dust with a size of 1 micron. PM0.1 nano dust: Ultra-fine dust less than 0.1 micron in size. PM2.5 fine dust is tiny dust particles present in the air with a size of 2.5 microns or less (it's about 30 times smaller than a human hair). The symbolic size of some types of dust compared to a human hair and a grain of sand. 2 Causes of PM 2.5 . dust PM2.5 fine dust appearing in the air originates from natural causes and man-made causes. Natural causes Wildfires : Large wildfires worldwide are largely caused by abrupt climate change. Sudden

To proceed with data recovery from iCloud, do the following: First, factory reset your iPhone. If you do not know how to restore factory settings, you can refer to the article: . When restoring to factory settings, the device will prompt you to restore data from iCloud or from iTunes. The phone will start clearing Settings and rebooting again. After your phone reboots, follow these steps: Step 1: Select Language (Vietnamese) . Step 2: Select Country or Region (Vietnam). Step 3: Login to Wifi Network . Step 4: Choose whether to turn Location Services on or off depending on your preference. Step 5: Set up Touch ID (if available). Step 6: Set a password for your iPhone. Step 7: Select Restore from iCloud Backup . Step 8: Sign in iCloud Account. Select Agree. Step 9 : Select the backup you want, the backup process will start right away and   iPhone will start downloading your data from iCloud to your device. Backup time depends on the d

1 What is acid rain? Acid rain is also known in English as Acid Rain, which refers to industrial pollutants present in rainwater and water with less than 5.6. Acid particles will be mixed in the rain water causing the pH to drop. Acid rain also dissolves some dangerous metals in the air, making rainwater more toxic. Acid rain is caused by emissions of SO2 and NO2 , produced by humans during the development of industry, chemicals,… Humans exploit a lot of coal, oil and natural fuels. Other factors are not reasonable, so it is easy for acid rain to appear. Areas most affected by acid rain worldwide are Eastern European countries from Poland northward into Scandinavia . This is followed by countries to the east of the United States and southeastern Canada . In addition, Southeast Asian countries are also affected, typically the southeast coast of China and Taiwan . 2 Causes of acid rain The causes of acid rain are many, but in general, they are mainly due to human

Aspirin medicine The use of aspirin is anti-inflammatory and pain-relieving, so it will help your acne reduce swelling and redness. Crush an aspirin tablet, dissolve it in water, and then apply it to your face overnight. Aspirin helps reduce inflammation, and relieve pain from acne Salt Instead of washing your face with plain water, you should dissolve salt to form a saltwater solution to wash your face. Salt has a very good antiseptic effect that makes acne less red and swollen. If acne on your face appears a lot, you should dilute the salt water solution for better results. After washing your face with salt water, remember to rinse with cold water to help close pores. Salt has an antibacterial ability to help reduce redness and swelling Fragrance-free mouthwash Flavored mouthwashes such as mint, vanilla, etc. will make your facial skin irritated. You should use an unscented mouthwash to apply on the acne to help disinfect effectively. Use fragrance-free mouthwash to disinfec

Reusing items in your home is also an effective way to save money . If you still don’t know where to start, refer to the method below, many people have applied and succeeded. 1. Use eggshells to unclog drains Eggshells are something most of us throw away, but they have so many ways to reuse them. You may have heard of how to add them to your garden fertilizer, for example. But there is a very good way to reuse, which is to put in the sink to retain small wastes, preventing them from clogging the drain. The eggshell will thin and break over time with use, then it has the effect of gently scrubbing the pipes as it drifts down. 2. Turn an old sock into a heating pad Many socks users often experience the situation of being lost, a piece disappears somewhere, or in the process of washing and drying it shrinks abnormally and cannot be used anymore. Then use it as a heating pad. Put the rice in an old sock, tie it up, then put it in the microwave to warm it up. Place it on your