UK Met Office
"Driving efficiently
Save money and reduce your carbon footprint by driving more efficiently.
The science is clear, the climate is changing. In the UK and around the globe we are already seeing changes to weather patterns and average temperatures as a result of human-induced anthropogenic) climate change....As well as thinking about the way we travel more generally, driving more efficiently will reduce emissions and cut down on costs."
https://www.metoffice.gov.uk/weather/climate/getclimateready/driving-efficiently