"SUVs are larger and heavier than a standard car, emitting about a quarter more CO2 than a medium-size car and nearly four times more than a medium-sized battery electric vehicle," said the UKERC.
"Assuming the majority of these SUVs will be on UK roads for at least a decade, it is estimated the extra cumulative emissions to total around 8.2 million tons of CO2."
They're tall, spacious, and styled to look as though they belong halfway up a mountain, even though most will never ever venture more than a few metres off-road. SUVs are undoubtedly popular with drivers. But they're also big and heavy - and that means they emit more CO2 than smaller cars.
The UKERC said the "extraordinary leap" in SUV sales over the past four years seemed to be due to "attractive car financing packages which divert attention from running costs".