Belching out fumes, Biden’s 20-vehicle motorcade

1. MERCEDES SPRINTER MINIBUS

The convoy includes two, both believed to transport members of the Press accompanying the President. They emit around 3.75kg of CO2 per mile and get around 14.5 miles per gallon. The average for cars in the UK is around 38mpg.

2. PRESIDENT’S LIMO, AKA ‘THE BEAST’

The convoy includes two of these Cadillacs: Mr Biden’s vehicle and a decoy. Each one reportedly emits around 4kg of carbon per mile – ten times more than an average car.

The Beast can achieve a measly eight miles per gallon.

3. SECRET SERVICE CHEVROLET SUBURBAN

Mr Biden’s convoy appears to have at least two of the specially made vehicles.

Reports suggest it has a 6.2-litre, V-8 engine which is about 420 horsepower.

It achieves about 15-21 miles per gallon, depending on conditions.

These are likely to carry secret service and security personnel.

4. 2018 JAGUAR

With a UK registration, the vehicle is believed to belong to the welcoming British police escorts.

The car, thought to be an XJ, emits around 2.75kg of carbon per mile. It has a gas-guzzling three-litre diesel engine.

... and passing wind turbines on its way to the Glasgow conference

Procession: Mr Biden’s team on the M8 after leaving Edinburgh...

Long blue line: Hundreds of police in Glasgow, for Biden’s arrival

Eye in the sky: A military helicopter shadowed the motorcade