What Are the Harms Caused by Automobile Exhaust?
3 Answers
Lead-containing gasoline causes automobile exhaust to contain high concentrations of lead, which poses serious harm to human health. The following are relevant solutions for non-compliant automobile exhaust: 1. Replace the spark plugs: Both new and old ones can be used, as long as the electrode points are cleaned with sandpaper and the gap is properly adjusted. 2. Clean the distributor contacts and rotor contacts: Adjust the ignition timing. Delaying the ignition timing will significantly reduce the NO (nitric oxide) content in the exhaust, which is crucial—please remember this! Due to the delayed ignition timing, the combustion time in the combustion chamber will be shortened, and the maximum combustion temperature will decrease, thereby reducing the emission of hydrocarbons and nitrogen oxides. However, this will result in a decrease in engine power.
To be honest, I can personally feel the significant harm of vehicle exhaust. That pungent smell during traffic jams always irritates my throat, forcing me to close windows even with recirculation mode on. What's worse is those nitrogen oxides in the exhaust - they turn into acid rain when meeting rainwater in the air, leaving my freshly washed car covered in spots last week. In summer, sunlight reacts with exhaust to create ozone, which makes my allergic rhinitis particularly unbearable. What worries me most is elderly people and children walking roadside - the lead and heavy metal particles in exhaust get trapped in their lungs permanently, and I've heard it affects children's brain development. Seeing traffic congestion near schools now really breaks my heart.
I've studied the composition of automobile exhaust pollutants, and the hazards are comprehensive. Carbon monoxide steals oxygen from the blood, and forgetting to close the window when the engine is off in a garage during winter can be fatal. Nitrogen oxides irritate the respiratory tract—my asthmatic neighbor dares not go out on smoggy days. Hydrocarbons and nitrogen oxides generate photochemical smog under sunlight, causing eye irritation and tearing. The PM2.5 in diesel vehicle black smoke carries heavy metals directly into the lungs, even affecting the cardiovascular system. Exhaust also contains carcinogens like benzene compounds, posing higher risks for those living in street-facing houses year-round. The withering of urban greenery is also linked to exhaust deposition.
