CO2 industry analysis

Clean Green Cars is the only environmental website to hold both CO2 data and registration data for all cars. That means we can calculate the real, sales-weighted, performance of each manufacturer, each model range or each segment of the market. For example, we can work out the overall performance of a manufacturer taking into account the sales and CO2 performance of all its hundreds of different model variants. By correlating CO2 data and sales, our figures are not skewed by one particularly clean (or one particularly dirty) version.

We have prepared three tables for 2011:

• Sales weighted CO2 performance by segment
• Sales weighted CO2 performance by manufacturer
• Sales weighted CO2 performance by model

We have also calculated the overall environmental performance of each manufacturer, taking into account CO2, NOx and particulates, to give a unique overall performance ranking.

• Overall environmental performance

Our unique Index of CO2 efficiency shows how well or badly each manufacturer is performing, given the size of their vehicles. A manufacturer that sells a broad range of cars and still manages to keep overall CO2 emissions low deserves more credit than a manufacturer that gets a low CO2 score by making only small cars.

• CO2 Index

Finally, we have a table showing the overall air quality impact of all manufacturers, taking into account the four pollutants that cause immediate harm to people: carbon monoxide, unburned hydrocarbons, oxides of nitrogen and particulates.

• Local air quality

Any content from the tables may be reproduced on condition that the source of the data is identified as www.cleangreencars.co.uk

You can also view our presentation to the UK car industry, covering the forthcoming EU CO2 regulations.

Download the presentation		Download the handout

Simon Mayo interviews Jay Nagley on Drivetime - Running a vehicle on chip fat.

BBC Radio 4 show 'You and Yours' Friday 4 June 2010 - The future of electric cars is in the spotlight as Radio 4 Presenter Peter Curran prepares for his 4,500 mile trip across Western Europe in an electric car - with comment from Jay Nagley, motor industry analyst and Publisher of the website www.cleangreencars.co.uk, and Prof Roger Kemp, University of Lancashire, who chairs the Royal Academy of Engineers Working Group on Electric Cars.