Reference
MEKA Concrete. (1987). Environmental aspects of concrete. Retrieved May 29, 2016, from https://www.mekaconcreteplants.com/en/service/technical-information/environmental-aspects-of-concrete
PBL Netherlands Environmental Assessment Agency. (2015). Trends in Global CO2 Emissions. Retrieved from http://edgar.jrc.ec.europa.eu/news_docs/jrc-2015-trends-in-global-co2-emissions-2015-report-98184.pdf
Portland Cement Association (1997). Concrete. Portland cement association, 18(2), . Retrieved from http://cement.org/tech/pdfs/pl972.pdf
Portland Cement Association. (2015). How concrete is made. Retrieved May 29, 2016, from PCA, http://www.cement.org/cement-concrete-basics/how-concrete-is-made
S, J. (2008). The concrete conundrum. Retrieved from http://www.rsc.org/images/Construction_tcm18-114530.pdf
United Nations Environment Programme. (2011). UNEP/GRID-Sioux falls. Retrieved May 29, 2016, from http://web.archive.org/web/20160304172817/http://na.unep.net/geas/science/alert_2010_10.php
MEKA Concrete. (1987). Environmental aspects of concrete. Retrieved May 29, 2016, from https://www.mekaconcreteplants.com/en/service/technical-information/environmental-aspects-of-concrete
PBL Netherlands Environmental Assessment Agency. (2015). Trends in Global CO2 Emissions. Retrieved from http://edgar.jrc.ec.europa.eu/news_docs/jrc-2015-trends-in-global-co2-emissions-2015-report-98184.pdf
Portland Cement Association (1997). Concrete. Portland cement association, 18(2), . Retrieved from http://cement.org/tech/pdfs/pl972.pdf
Portland Cement Association. (2015). How concrete is made. Retrieved May 29, 2016, from PCA, http://www.cement.org/cement-concrete-basics/how-concrete-is-made
S, J. (2008). The concrete conundrum. Retrieved from http://www.rsc.org/images/Construction_tcm18-114530.pdf
United Nations Environment Programme. (2011). UNEP/GRID-Sioux falls. Retrieved May 29, 2016, from http://web.archive.org/web/20160304172817/http://na.unep.net/geas/science/alert_2010_10.php