1. California Department of Water Resources Water use efficiency ideas http://www.water.ca.gov/wateruseefficiency/docs/Food.pdf
2. Canning , P. Charles , A. Huang , S. Polenske , K. Waters , A. 2010 Energy use in the U.S. food system http://web.mit.edu/dusp/dusp_extension_unsec/reports/polenske_ag_energy.pdf
3. Carbon Trust 2010 Carbon savings in a can: Efficiencies on the production line http://www.heinz.com/csr2011/media/environment/Heinz%20Beanz%20Energy%20Reduction.pdf
4. Coca-Cola Water stewardship http://www.coca-colacompany.com/sustainabilityreport/world/water-stewardship.html#section-mitigating-riskfor-communities-and-for-our-system