Las Vegas, Nevada 2021-09-28 21:57:23 –
(StudyFinds) -Old cars have a bad reputation as “gas guzzlers” that only exacerbate global warming. But a surprising new study reveals that replacing an old car with a new electric car can actually do more harm than good. Japanese researchers say that if you choose to keep your old petrol car longer and drive it, less emissions will enter the environment.
According to the Kyushu University team, most discussions about gasoline and electric vehicles focus on fuel economy and the CO2 emissions they produce. Electricity and hydrogen are cleaner energy sources, but this study found that manufacturing these vehicles still requires a lot of energy. Specifically, researchers have found that leaving old fuel-efficient vehicles on the road for long periods of time can significantly reduce CO2 emissions rather than accelerating the global transition to green technology.
“The sooner a car is replaced, the more CO2 it emits. It’s no different from an electric car, because as the demand for new cars increases, so does the manufacturing industry’s emissions,” says Kagawa, Faculty of Economics, Kyushu University. Professor Shigemi talks. University release.
Car life is too short
In Japan, car production and replacement is a surprisingly fast process. Researchers have found that the average lifespan of a car from a production plant to a demolition yard is only 13 years. In addition, brand new cars will only stay with the first owner for seven years.
This rapid sales mean that as more and more cars (even electric cars) roll off the assembly line, factories are constantly emitting more harmful emissions.The team adds that in Japan, the country’s mass-consumption economy and expensive vehicle inspection systems are also contributing. The dilemma of this environment.
“Vehicles’ carbon dioxide emissions are not limited to the fuel they use. To manufacture alternative fuel vehicles aimed at reducing driving emissions, construction iron, nuts, bolts, and assembly We need a factory, a mega-container for transportation. All these points in the supply chain generate CO2. “
Looking at Japan’s greenhouse gas production, automobiles account for about 9% of total emissions, and 40% of this amount. Gasoline combustion by driving New cars and 24% come from the manufacturing process of these cars.
“Our hypothesis is that driving the current internal combustion engine car a little longer during the transition to a green car is a viable strategy to help the environment,” explains Kagawa.
How long should you keep your car?
The team used economic statistics to survey Japan’s population of both new and used cars from 1990 to 2016.According to the data, “exchange behavior” National carbon dioxide emissions.
The results show that if car owners leave their cars on the road 10% longer before sending them to the scrapyard, their overall carbon dioxide emissions will be reduced by 30.7 million tonnes. This is equivalent to a 1% reduction in CO2 emissions.Researchers say the reason for this is that building a new car actually produces more. Greenhouse gas Rather than keep driving an existing car — even if they Please use gasoline.
There are also environmental benefits if the brand new car owner holds the car longer before it trades in. The authors of the study say that if new car owners continue to ride 10% longer, their carbon dioxide emissions will decrease by 1%.
“This means that we can reduce CO2 emissions just by driving the car for a long time,” Kagawa concludes. “In addition, if the car we store is relatively new and fuel efficient, the effect will be greater. Therefore, the next time we are thinking of buying a new car, we will be in the current car. Consider if you have a few more kilometers left. “
The study will be displayed in Journal of Industrial Ecology..