Breakdown of greenhouse gas emissions in the UK 2019, by sector

The transportation sector is the main source of greenhouse gas emissions in the United Kingdom. In 2019, net greenhouse gas emissions in the UK totaled 455 million metric tons of carbon dioxide equivalent, of which 27 percent was attributable to transportation. With tens of millions of cars on the roads in the UK, passenger car emissions are by far the biggest contributor to transportation emissions.

In previous years the energy supply sector was the most polluting sector in the UK, but emissions from this sector have fallen dramatically as the country shifts away from coal and transitions to cleaner energy sources. In 2015, energy supply emissions had dropped below transportation emissions for the first time.