automobiles, there are more places where fine dust comes out in addition to exhaust gas.
The amount of fine dust from automobile tires and brakes is also quite serious.
However, the problem is that unlike emissions, it is not regulated at all.
This is reporter Song In-ho.
is a wheel made of aluminum mounted on a passenger car tire.
There is a lot of black powder on the inside as well as the outside of the wheel.
Particles caused by the wear of the brake system when applying the vehicle's brakes.
[Cho Hyosung/Incheon Namdong-gu Automobile Industry Representative: (Brake) Depending on how many times it is stepped on and how much it wears, so many (particles) appear.] When
I measured the size and amount of the particles, it was less than a minute. The level of fine dust below 10㎛ increases by 140 times.
The amount of fine dust generated by the brake system increased as the vehicle weight, braking strength, and brake temperature increased.
The fine dust from the tires is also significant, so those with small particles float in the air without sinking on the road.
[Yun-Sung Lim / Researcher, Transportation Environment Research Institute, National Institute of Environmental Sciences: When the life of a tire reaches 40 to 50,000 km, it is replaced, and the weight is about 1 to 1.5 kg.
The contribution that floats in the air is surveyed about 2%.]
It is known that the amount of fine dust caused by tires and brake systems in crowded urban areas accounts for up to 40% of the fine dust emitted by vehicles.
[Sung-Heon Ham/Professor, Department of Occupational Environmental Medicine, Gachon University Gil Hospital: When tires or brakes are worn, fine dust containing various metal components is generated.
The higher the concentration of fine dust, the higher the probability of developing respiratory diseases such as lung function decline, asthma, and lung cancer.] The
problem is, unlike exhaust gases that are increasingly regulated, the emission standard of fine dust from tires and brake systems However, there are no related regulations yet.
If the supply of eco-friendly vehicles is accelerated, the amount of fine dust caused by tires and brake systems is expected to overtake the exhaust gas by 2025, so the government needs to prepare measures.
(Video coverage: Jang Woon-seok, video editing: Kim Sun-tak, CG: Ryu Sang-soo)
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