1. Duane B, Berners Lee M, White S, Stancliffe R, Steinbach I. An estimated carbon footprint of NHS primary dental care within England. How can dentistry be more environmentally sustainable? Br Dent J 2017; 223: 589-593.
2. Sustainable Development Unit. Carbon footprint update for NHS in England 2015. 2016. Available at https://www.sduhealth.org.uk/policy-strategy/reporting/nhs-carbon-footprint.aspx (accessed March 2019).
3. Sustainable Development Unit. Health Outcomes of Travel Tool (HOTT). 2019. Available at https://www.sduhealth.org.uk/delivery/measure/health-outcomes-travel-tool.aspx (accessed March 2019).
4. Committee on the Medical Effects of Air Pollutants (COMEAP). Statement on the evidence for the effects of nitrogen dioxide on health. 2015. Available at https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/411756/COMEAP_The_evidence_for_the_effects_of_nitrogen_dioxide.pdf (accessed March 2019).
5. Department for Environment, Food and Rural Affairs. Air Pollution in the UK 2016. 2017. Available at https://uk-air.defra.gov.uk/assets/documents/annualreport/air_pollution_uk_2016_issue_1.pdf (accessed March 2019).