According to a new report by the UN Environment Programme, millions of used cars, vans and minibuses exported from Europe, the United States and Japan to the developing world contribute significantly to air pollution.
The report added that these vehicles are of poor quality and are hindering efforts to mitigate the effects of climate change.
The Global Overview of Used Light-Duty Vehicles: Flow, Scale and Regulation report showed that between 2015 and 2018, 14 million used light-duty vehicles were exported worldwide.
Some 80 per cent went to low- and middle-income countries, with more than half going to Africa.
The report called for action to fill the current policy vacuum with the adoption of harmonized minimum quality standards that will ensure used vehicles contribute to a cleaner, safer fleet in importing countries.
UNEP statement on its website stated that globally, the transport sector is responsible for nearly a quarter of energy-related global greenhouse gas emissions.
Specifically, vehicle emissions are a significant source of the fine particulate matter and nitrogen oxides that are major causes of urban air pollution.