When we drive our beloved car and take our family to shuttle between cities, enjoying convenient transportation and joyful times, do we realize that enclosed car spaces may hide hidden health hazards? Harmful substances such as formaldehyde and benzene quietly invade our respiratory tract and may even cause serious health problems. Therefore, understanding how to improve the air quality inside the car and choosing a powerful in car air purifier is crucial for safeguarding the health of us and our families.

Firstly, we need to know that formaldehyde and benzene mainly come from materials such as plastics, adhesives, and paints used in car interiors. These materials can release these harmful substances when the temperature rises or when exposed to sunlight. The working principle of the car air purifier is to adsorb and decompose these harmful substances through a built-in filter system, thereby purifying the air inside the car.

Energy plays a primary role in the economic development of any country because it is the driving force for social, industrial, technological, and cultural integration, and can drive a country towards a sustainable and prosperous future. The rapid development of China's economy is accompanied by a large amount of energy consumption. While supporting economic development with a large amount of fossil energy consumption, China has also actively adapted to the global energy reform situation.   In 2014, the General Office of the State Council issued the "Energy Development Strategic Action Plan (2014-2020)", proposing to accelerate the construction of a clean, efficient, safe, and sustainable modern energy system and adhere to the strategic policy of "conservation, cleanliness, and safety". According to BP World Energy Statistics, China's self-sufficiency rate of primary energy is at the middle level in the world. Although the total energy is not small, the per capita ownership is low. By the end of 2017, China's coal reserves and production ratio accounted for about 3/10 of the world average, oil reserves and production ratio accounted for about 1/3 of the world average, and natural gas reserves and production ratio accounted for about 2/3 of the world average (British Petroleum, 2018). The level of fossil energy security plays a crucial role in the overall level of energy security. In 2017

When choosing a car air purifier, an important indicator we need to pay attention to is the formaldehyde CADR value. CADR value is an abbreviation for clean air output rate, which can reflect the ability of air purifiers to remove formaldehyde. The higher this value, the stronger the ability of the air purifier to remove formaldehyde. So, when choosing a car air purifier, we should prioritize products with high formaldehyde CADR values.

1.5 Sample collection, washing (processing), and heavy sand (chemical) analysis 1.5.1 Sample Collection 1.5.1.1 Trench exploration should be carried out to a depth of 0.3m in weathered bedrock, and groove sampling should be conducted. The cross-section of the sample groove should not be less than 0.2m × 0.1m, sample length should not exceed 1m

From the perspective of China's geological conditions, the total amount of green coal resources is relatively small, and the development pattern needs further improvement. Therefore, China's coal industry should be based on green coal resources, supported by technology, scientifically improve the level of coal resource recovery, and achieve coordinated development between resource extraction and the environment.