1. Carbon footprint and cost-effectiveness of cataract surgery;Venkatesh;Curr Opin Ophthalmol,2016
2. Carbon footprint of robotically-assisted laparoscopy, laparoscopy and laparotomy: a comparison;Woods;Int J Med Robot,2015
3. Product life cycle accounting and reporting standard;Greenhouse Gas Protocol – World Business Council for Sustainable Development,2011
4. Greenhouse gas reporting – conversion factors;The United Kingdom Government,2016
5. Forestry and climate change pack-6. Mitigation: planting more trees;Forestry Commission England,2010