5.4. List of web links http://www.ck12.org
4hamks - http://www.methanetomarkets.org/resources/landfills/docs/uk_lf_profile.pdf
65h3cb - http://www.dorset-technical-committee.org.uk/reports/U-values-of-elements-Sept-2006.pdf
5dhups - http://www.arct.cam.ac.uk/UCPB/Place.aspx?rid=943658&p=6&ix=8&pid=1&prcid=27&ppid=201
2bqapk - wwwphys.murdoch.edu.au/rise/reslab/resfiles/tidal/text.html
r22oz - www-materials.eng.cam.ac.uk/mpsite/interactive_charts/energy-cost/NS6Chart.html
3kmcks - http://www.yourhome.gov.au/technical/index.html
3kmcks - http://www.yourhome.gov.au/technical/index.html
3b7zdf - http://www.communities.gov.uk/publications/planningandbuilding/generalizedlanduse
3av4s9 - hdr.undp.org/en/statistics/