How big is the exhaust gas?

Vehicles using modern engines are 'cleaner' than those using older engines. However, no matter which car, after starting the engine, the exhaust system will also escape a variety of exhaust gases, mostly toxic gas with much less content.

CO ₂ gas

CO2 (Carbon dioxide) is the gas that accounts for the highest proportion of the total emissions emitted from the exhaust pipe of a car after the engine starts. However, there is a fact that despite being called 'emissions' , we cannot survive without CO2.

People are creating too much CO2.

In essence, CO ₂ is a toxic gas but useful because it has the ability to reduce the heat of solar energy, keep the earth warmer, and help plants and animals grow harmoniously. In addition, CO2 is also a material that helps plants photosynthesize and release oxygen, making the air more fresh.

The problem is that people are increasingly creating too much CO2. The amount of this gas dissolves into the atmosphere, combined with some other gases causing the greenhouse effect to cause global warming. The consequence of this is that the earth's climate fluctuates in a negative direction and accelerates the melting of the Arctic glaciers causing sea level rise.

Although manufacturers have applied many advanced technologies to minimize the amount of CO ₂ released from the car exhaust, but until now, even the cars that are considered 'cleanest' are discharged near 100g / km. Stronger gasoline engine cars can also emit 5 times the amount of CO2.

CO

The second type of exhaust exiting the car exhaust has a concentration just behind CO ₂ , Carbon Monocide CO . This type of waste reduces the ability of circulating oxyen in the blood to make the body weak. A very small amount of CO can also make your heart beat faster and increase your risk of heart disease.

This type of waste reduces the ability of circulating oxyen in the blood to make the body weak.

In addition, CO can also combine with some other gases to produce high concentration ozone gas which adversely affects human health. Ozone gas when lying on the atmosphere is more than 30km from the ground to protect people from ultraviolet rays from the sun, reducing the risk of skin cancer and cataract. But when this gas exists next to us, it is very toxic because when inhaling ozone, the function of the lungs will decrease and that is the ideal condition for diseases related to respiratory development. .

Controlling a car is a person who indirectly produces CO gas and a gasoline engine is a direct agent. However, in recent years, the amount of CO released from the exhaust pipe has decreased by 90% because the manufacturers have equipped the exhaust gas filter to help convert a large part of CO gas into steam and CO. ₂ before they are released into the air.

NOx gas

NOx (Nitrogen Oxide) is a gas mixture consisting of nitrous oxide N ₂ and nitrogen dioxide NO ₂ . These are gases that increase the greenhouse effect and are extremely harmful to human health, especially, it has the ability to increase respiratory diseases, eyes, nose .

NOx toxicity compared to CO ₂ is hundreds of times higher.

The NOx content discharged from the exhaust pipe of the vehicle is not as much as the CO _{2 content,} but the toxicity is hundreds of times higher. Similar to CO, NOx gas is able to react with some other substances in the air to produce ozone gas in the atmosphere, which seriously affects human health, and contributes to acid rain. Harms the growth of plants.

NOx gas exists in many urban areas with many means of operation. In the UK, cars are considered to be the main culprits that produce more than half of the NOx produced by human activity, in which diesel-powered vehicles have NOx emissions. 5 times more than the equivalent gasoline engine car.

Granular impurities

Tiny granular impurities are produced mainly from diesel engines. Gasoline engines also produce solid particles with very little content.

Considered as microscopic dust particles, these types of impurities are more likely to enter our lungs, in which (smaller particle sizes of 2.5 microns) are the most dangerous. They are capable of moving hundreds of kilometers and survive in the air for weeks.

Hydrocarbons THC and some other wastes

In addition to CO _2, CO, NOx and granular impurities ., after starting the engine, the cars also release a mixture of gas hydrocarbons including benzene and issoctane very toxic. Gasoline engine cars emit more hydrocarbons than equivalent diesel engines.

Gasoline engine cars emit more hydrocarbons than equivalent diesel engines.

Benzene is a toxin that interferes with the body's blood production and causes anemia. Recently, the International Agency for Research on Cancer (IARC) also determined that benzene is a carcinogen that can cause bone toxicity and can cause leukemia. Hydrocarbon combined with NOx will produce ozone gas.

Some gases in the hydrocarbon gas mixture react directly with ozone in the atmosphere to produce oxygen. It seems that this will be a good thing but the truth is not so because in fact, ozone gas can protect us from ultraviolet rays that cause cancer from the sun but oxygen does not have that ability.

In addition, there are some other emissions from car exhaust, including SO2 sulfur dioxide, nitrogen and steam. SO ₂ causes acid rain, aggravating asthma and risk of respiratory damage. The steam causes a greenhouse effect because it retains the sun's heat, only nitrogen is not harmful to the environment and humans.

Conclude

Although it is not only cars that cause air pollution, however, it is undeniable that they are one of the major hazards of the environment. To protect the living environment and meet increasingly stringent emissions standards, manufacturers still have a long way to go in order to find the right direction and produce many indexed cars. The highest 'clean'.