What Are the Harms Caused by Automobile Exhaust?

[EliasDella]

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.

[PatrickAnn]

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.

[DeChristopher]

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.

[VanAdaline]

The day before yesterday at the car wash, I overheard a customer complaining that exhaust fumes had turned the collar of his freshly washed white shirt yellow. There's actually scientific basis for this. Sulfur dioxide in exhaust can corrode metal parts—my bicycle chain rusted solid after being parked roadside for six months. What's more annoying is that suspended particulate matter increases smoggy days; last winter, every landscape photo I took looked hazy. Studies suggest exhaust even affects sleep quality—there's a correlation between nighttime noise pollution and sleeping pill sales in areas with excessive pollution. My potted succulents kept dying on the balcony until I discovered lead from exhaust had contaminated the soil.

[Moreira]

I noticed that the intensification of urban heat island effect is closely related to vehicle exhaust emissions. The components of exhaust gases block the dissipation of ground heat, causing summer temperatures in central urban areas to be 3-5°C higher than in suburbs. Those dust particles that adsorb exhaust fumes can easily cause allergies when they land on the skin. My daughter developed a red rash on her neck last summer, and the doctor advised avoiding main roads. Hospital data also shows a sharp increase in respiratory emergency cases after the morning rush hour. Although carbon dioxide in exhaust is non-toxic, global transportation accounts for 14% of annual emissions. When I checked the data, I found that New York's annual carbon emissions trapped per square kilometer of road reached 180 tons.