CAR EMISSION ?

 As we know, every of ICE car or Internal Combustion Engine will produce an emission. But, how much does a car produce and will it give harm the environment ?

The composition of combustion gas is nitrogen (N2), water vapor (H2O) , and carbon dioxide (CO2)  these are not toxic or noxious. A relatively small part of combustion gas is undesirable, noxious, or toxic substances, such as carbon monoxide (CO) from incomplete combustion, hydrocarbons, but typically shown simply as "HC" on emissions-test slips from unburnt fuel, nitrogen oxides (NOx) from excessive combustion temperatures, and particulate matter

This figure shows the estimate of average passenger car emissions in the United State in 2000. It shows the hydrocarbon with an emission rate of 2.80 grams/mile (1.75g/km) with annual pollution emitted of 77.1 pounds. For carbon monoxide, the emission rate is at 20.9 grams/mile (13.06 g/km) with annual pollution emitted of 575 pounds ( 261 kg). For NOx, the emission rate is 1.39 grams/mile (0.87g/km) with annual pollution of 38.1 pounds (17.3 kg). Lastly carbon dioxide ( greenhouse gas) with 415 grams ( 258 g/km) with annual pollution emitted  11,450 pounds ( 5,190 kg ).

So with this number, is it the emission that produces by cars is harming the enviroment ?

sciencing.com stated the effect of car emission :

1. Global Warming

Car pollution is one of the major causes of global warming. Cars and trucks emit carbon dioxide and other greenhouse gases, which contribute to one-fifth of the United States' total global warming pollution. Greenhouse gases trap heat in the atmosphere, which causes worldwide temperatures to rise. Without greenhouse gases, the Earth would be covered in ice, but burning excessive amounts of fossil fuels, such as gasoline and diesel, has caused an increase of 0.6 degrees Celsius, or 1 degree F, in global temperatures since pre-industrial times, and this will continue to rise over the coming decades. Warmer global temperatures affect farming, wildlife, sea levels and natural landscapes.

2. Air, Soil and Water

The effects of car pollution are widespread, affecting air, soil and water quality. Nitrous oxide contributes to the depletion of the ozone layer, which shields the Earth from harmful ultraviolet radiation from the sun. Sulfur dioxide and nitrogen dioxide mix with rainwater to create acid rain, which damages crops, forests and other vegetation and buildings. Oil and fuel spills from cars and trucks seep into the soil near highways, and discarded fuel and particulates from vehicle emissions contaminate lakes, rivers and wetlands.

3. Human Health

Particulate matter, hydrocarbons, carbon monoxide and other car pollutants harm human health. Diesel engines emit high levels of particulate matter, which are airborne particles of soot and metal. These cause skin and eye irritation and allergies, and very fine particles lodge deep in the lungs, where they cause respiratory problems. Hydrocarbons react with nitrogen dioxide and sunlight and form ozone, which is beneficial in the upper atmosphere but harmful at ground level. Ozone inflames the lungs, causing chest pains and coughing and making it difficult to breathe. Carbon monoxide, another exhaust gas, is particularly dangerous to infants and people suffering from heart disease because it interferes with the blood's ability to transport oxygen. Other car pollutants that harm human health include sulfur dioxide, benzene and formaldehyde. Noise from cars is also harmful, damaging hearing and causing psychological ill-health.

To conclude, the emission produced by a car affects the environment. Because of that, car developer nowadays has changed the car powertrain system that before used fuel to make the car move to electricity to move the car. There are a few car developers that start producing a car that moves by electric which is like the TESLA, BMW, Toyota and many more. This change is to move to a new resource and renewable energy that will be more eco-friendly to the nature and environment.