The automotive market is developing very dynamically. In recent years, we can observe activities of automotive
concerns in the production of new models of electric, hybrid and hydrogen vehicles, and conventional cars are
supplied with increasingly economical and low-emission engines. There are also increasingly stringent standards
related to exhaust emissions from the exhaust system. From September 1, 2018, passenger cars have to comply with
the Euro 6d-Temp emission standard and be homologated according to the WLTP test procedure including the WLTC
driving cycle and emission measurements in road traffic conditions. The exhaust components measured during the
test, such as carbon oxides, nitrogen oxides or hydrocarbons, are toxic to living organisms. However, it seems that the
most important issue in the long term may be the value of carbon dioxide emissions, the excess of which poses an
ecological threat to the entire planet. The production of new vehicles equipped with modern complicated combustion
engines, batteries, fuel cells and electronic devices is associated with a very high emission of this greenhouse gas The
authors of the following article, based on their own research, sought to estimate the ecological profitability of
replacing a used passenger car meeting the Euro-4 emissions standard for a new vehicle bearing in mind the value of
carbon dioxide emissions during vehicle production. The analysis was to indicate how intensive the annual operation
of the vehicle should be to make it profitable to recycle and replace it with a modern car with lower emissions
considering the global sum of carbon dioxide emissions.
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