About us


This website was launched in 2007 to give unbiased information on climate change, carbon dioxide and other greenhouse gas emissions, and how to become independent of fossil fuels. The calculator is constructed according to the best information available, and will be updated as new information becomes available.

We have no financial interest in this area. We have constructed the website because we care about what is happening to our world, and are concerned about the future of children and future generations.

The main author is Ian Campbell BA BSc MD FRCS FRCR.

Ian Campbell has worked as a doctor and as a medical statistics consultant. As well as medical qualifications, he has a degree in statistics and a doctorate in the use of statistical methods in cancer research - see www.iancampbell.co.uk.
On Twitter: @Ian_Campbell_

Thanks are due to Margaret, Helen, Debbie, Peter, Carol, Geraldine, Clive, Andrew, Patrick, Ann, Gen and John for feedback on earlier versions of the calculator.

Contact us

Comments on any aspect of this website are welcome.

The aim is to give a fair summary of the evidence, and give unbiased conclusions. If we have omitted important considerations, or not given them due weight, please let us know.




Flooded telephone box: The Flood! Catcliffe Fire Brigade rescuers: Copyright Mark Lomas www.flickr.com/photos/outallnight/

Dry river bed: Matt & Kim Rudge www.flickr.com/photos/mattandkim/94501076/in/datetaken/

Evidence of the severity of the drought in Kenya - this was marked on the map as a river.

Wind turbines: Stuart Yeates www.flickr.com/photos/stuartyeates/93821358/in/datetaken/

Boys biking, silhouette: Copyright Karl Hutchinson: www.flickr.com/photos/whateverthing/

First published Feb 2007
Last updated: 7 Apr 2022