BEIJING， Jan. 15 (Xinhua) -- Smog will hit some parts in north and central China starting from Sunday， China's national observatory warned， suggesting people in affected areas to make precautions.
The smog， which will hit Beijing， Tianjin， Hebei， Shanxi， Henan and Shaanxi， is expected to last until a cold front comes to the rescue around Thursday， the National Meteorological Center said.
People in the affected regions were asked to make precautions and choose public transport services to cut emissions and mitigate pollution.
Severe smog triggered red alerts in more than 20 cities at the beginning of 2017. When authorities issue red alerts， some manufacturers are required to cut production， and heavily polluting vehicles are banned from the roads.
China has a four-tier color-coded warning system for severe weather， with red being the most serious， followed by orange， yellow and blue.
In environment inspections last year， the Ministry of Environmental Protection said a total of 720 people were detained and 6，454 held accountable for environment-related wrongdoing.
In 2016， the government refused 11 high-pollution and high-energy consuming projects， involving total investment of 97 billion yuan (about 14 billion U.S. dollars).
Partly due to those efforts， Chinese cities reported less pollution in 2016， with the average density of PM 2.5 -- fine particles that pose health risks -- in 338 cities falling by 6 percent.
China is aiming for a 10-percent reduction in air emissions from 2012 levels by 2017 in cities at the prefecture level and above. Meanwhile， the PM 2.5 density in Beijing， Tianjin and Hebei Province should drop 25 percent.
Kids are all reeling from the excitement of the Olympic Games these last few weeks Authentic Greg Bird Jersey , but can they relate any of that to science? Absolutely!
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Chemistry is often a difficult concept for younger students, but you can still introduce your kids to chemical science. Try not to be discouraged by the complexity of the chemical reactions themselves.
Explain that Usain Bolt was breathing hard after his 200 meter sprint because of chemical reactions in his body. All the muscles in his body burn energy and use oxygen when he runs. The oxygen is brought to his muscles from the air around us by several chemical reactions. When you breathe in Authentic Mickey Mantle Jersey , the oxygen is taken from the air in your lungs and passed into your blood by a chemical reaction. The blood moves the oxygen to your muscles, where it is used in another chemical reaction.
Ask your kid if they can talk about the science behind food getting to muscles as energy. Usain's body uses chemical reactions in digestion and in the blood to bring nutrients from food to his muscles, and his muscles use chemical reactions to store and use them to make energy. Kids will still grasp the basic concepts of chemical science without complex equations. Kids will also be better prepared to learn the specifics of science in school if they have been relating the concepts to the world around them.
You can use sports to help your kids learn and love science. Science can be applied to so many aspects and moments in every sport, it shouldn't be hard for you to identify connections of your own. Take a look in your child's science book this year Authentic Babe Ruth Jersey , and next time you're watching sports, bring up a few concepts. Before you know it, you kid will be talking about how Peyton Manning could improve his throw by considering Newton's 3rd law more closely!
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