Truck on Great Western Highway from Sydney to Adelaide, New South Wales, Australia

Truck on the Great Western Highway from Sydney to Adelaide, New South Wales, Australia

Truck on the Great Western Highway from Sydney to Adelaide, New South Wales, Australia

Truck on the Great Western Highway from Sydney to Adelaide, New South Wales, Australia

Truck on the Great Western Highway from Sydney to Adelaide, New South Wales, Australia

Exhaust fumes from a car exhaust pipe in freezing weather, Ambleside, Cumbria, England, United Kingdom, Europe

Exhaust fumes from a car exhaust pipe in freezing weather, United Kingdom, Europe

An oil leak in a car park

Exhaust fumes from a car on a cold morning, United Kingdom, Europe

Exhaust with exhaust gases of a combustion engine, diesel engine, Baden-Wuerttemberg, Germany, Europe

Smoke stacks emitting smoke, USA, New York State, Ticonderoga