1. British Columbia Ministry of Environment (B.C. MoE) (2013) Carbon Dioxide Equivalent (CO2e). Climate Action Secretariat (CAS)—glossary, The Government of British Columbia. http://www.env.gov.bc.ca/cas/resources/glossary.html . Accessed 11 June 2013
2. Chen C, Habert G, Bouzidi Y, Jullien A (2010) Environmental impact of cement production: detail of the different processes and cement plant variability evaluation. J Clean Prod 18:478–485
3. CEDD (2011) Quarries in Hong Kong. Hong Kong Civil Engineering and Development Department (CEDD). http://www.cedd.gov.hk/eng/publications/information_notes/doc/IN_2011_01E.pdf . Accessed on 12 September 2013
4. CLCD (2010) Bulk cargo shipping (2500 t)–CN–AP. Chinese Life Cycle Database Version 0.8, Sichuan University; IKE Environmental Technology CO., Ltd
5. CLCD (2008) Clay extraction–CN–AP. Chinese Life Cycle Database Version 0.8, Sichuan University; IKE Environmental Technology CO., Ltd