The CO2 in car exhaust will accelerate global warming. Many scientists predict that the next 50 to 100 years will completely enter a warming world. Due to the influence of human activities, the concentration of greenhouse gases has increased too fast, the global average surface temperature will rise by 1.4~5.8℃ in the next 100 years, and the average temperature in China will rise by 2.2℃ by 2050.
CO2 is one of the main greenhouse gases in the atmosphere. When the content of CO2 in the atmosphere increases, it will increase the atmosphere’s absorption of infrared radiation from sunlight, prevent the heat from the earth’s surface from radiating outward, and increase the average temperature on the earth’s surface, creating a greenhouse. effect. The annual global CO2 emissions have exceeded 10 billion tons, of which car exhaust CO2 emissions account for 10% to 15%. With the continuous increase of CO2 emissions from automobile exhaust, the global warming process will accelerate, directly threatening the human living environment.
The rapid development of the automobile industry will face tremendous pressure to reduce CO2 emissions. According to forecasts by international authoritative organizations, between 2004 and 2030, about half of the increase in CO2 emissions will come from Asia, while China’s increase will account for half of Asia.
In September 2009, President Hu Jintao promised at the United Nations Climate Summit that China will reduce emissions of 1.5 billion tons of CO2 in five years, and CO2 emissions per unit of GDP in 2020 will be reduced by 40% to 45% compared to 2005.
In recent years, China has adopted a series of advanced technologies to maximize the energy efficiency of automobiles, including small-displacement engines, lean-burn engines, electric vehicles, and natural gas vehicles. It is estimated that by 2030, the total emission of CO2 in China’s automobile exhaust is expected to be reduced by 45%.
In order to strictly limit the CO2 emissions in automobile exhaust, countries are actively improving and upgrading automobile CO2 emission regulations. The following table shows the CO2 and emission standards for automobiles established by the European Union (hereinafter referred to as the European Union).
CO2 emissions (g/km): 160
Corresponding fuel consumption (L/100km): 7
CO2 emissions (g/km): 140
Corresponding fuel consumption (L/100km): 6
CO2 emissions (g/km): 130
Corresponding fuel consumption (L/100km): 5
CO2 emissions (g/km): 95
Corresponding fuel consumption (L/100km): 4
Car noise pollution.
Automobile noise is the second public nuisance of automobiles. It increases with the increase of automobile engine power, vehicle speed and automobile flow. Automobile noise accounts for about 75% of urban noise. Vehicle noise sources are generally divided into engine noise and vehicle noise. Engine noise is related to engine speed, mainly including intake noise, exhaust noise, fan noise, and running noise; vehicle noise is related to vehicle speed, including transmission noise, tire noise, and aerodynamic noise.
The impact of noise on people is a relatively complex issue, and its degree of impact is not only related to the nature of the noise, but also related to various factors such as each person’s psychological, physical state, and social life. Car noise pollution makes people feel restless, irritable, tired, and work efficiency decreased. In severe cases, people’s hearing level can be reduced, and even deafness can be caused. Car noise also interferes with the language exchange and communication between people, increases the reaction time of drivers, and affects driving safety.
Automobiles and transportation
While automobiles have brought convenience to humans, their numbers have increased, causing urban traffic congestion and frequent traffic accidents. According to statistics, about 1.25 million people die in car accidents globally every year, that is, more than 2 people die in traffic accidents every minute, and car traffic accidents have become “the world’s number one public hazard.”
Road traffic accidents are related to many factors such as people, vehicles, roads and traffic environment. In view of the influencing factors of the car itself, Hyundai cars pay more and more attention to safety design. In the body structure, full consideration is given to minimizing the damage to the occupants in the car in the event of a collision, using safety steering wheels, ultra-high-strength body, energy-absorbing body, etc.; and adopting anti-lock braking, acceleration and anti-skid, and body stability , Airbags, cruise control and other electronic control technologies to improve the active safety and passive safety performance of the car. In addition, people, vehicles, roads and traffic environment must be considered as a whole. For example, the use of advanced electric wire control technology, car networking technology and intelligent technology to improve the safety awareness of pedestrians and drivers, improve the road traffic environment, strengthen the safety inspection and maintenance of vehicles, improve traffic management and other measures to effectively reduce road traffic accidents Rate.