Level 5 Resources and Sustainability Learning Workbook, ISBN: 9781988586113 (2021 edition)
Level 5 Resources and Sustainability Learning Workbook, ISBN: 9781927297315 (2014 edition)
Page 36
Activity 1: Question 10 - Samso Island
https://www.carbonzero.co.nz/calculators/
(Please note that link in book is no longer correct - http://myfootprint.org/en)