SOURCES OF INFORMATION:
Ms. Valeria Verdalet
1667471 ALMAGUER GAONA ANDREA ELIZABETH
1663092 AGUILAR MUÑOZ CLAUDIA CAMILA
1658843
1657378
Almacenan presas que abastecen a Monterrey más agua que hace un año. (s.f.). Recuperado el 26 de May de 2014, de Crónica.com: http://www.cronica.com.mx/notas/2004/135143.html
Effects of Co2. (s.f.). Recuperado el 26 de May de 2014, de Carbon Calculator : http://www.carboncalculator.co.uk/effects.php
Eric, k. D. (s.f.). How to Take Action to Reduce Global Warming. Recuperado el 28 de May de 2014, de wikiHow to do anything : http://www.wikihow.com/Take-Action-to-Reduce-Global-Warming
Freund, L. (s.f.). eHow. Recuperado el 26 de May de 2014, de What Climate Reactions Affect Climate Change?: http://www.ehow.com/info_8309702_chemical-reactions-affecting-climate-change.html
Human impacts . (s.f.). Recuperado el 26 de May de 2014, de reefED: http://www.reefed.edu.au/home/explorer/hot_topics/water_quality/human_impacts
KID'S CROSSING. (s.f.). Recuperado el 05 de May de 2014, de The Carbon Cycle : https://eo.ucar.edu/kids/green/cycles6.htm
Krystle C., B. R. (s.f.). How to Purify Water. Recuperado el 26 de May de 2014, de wikiHow to do anything : http://www.wikihow.com/Purify-Water
Ophardt, C. E. (s.f.). Virtual Chembook. Recuperado el 26 de May de 2014, de Carbon Cycle : http://www.elmhurst.edu/~chm/vchembook/306carbon.html
River and Stream Pollution. (s.f.). Recuperado el 26 de May de 2014, de National Inctitute of Environmental Health Sciences : http://kids.niehs.nih.gov/explore/pollute/riverstream.htm
Six Common Air Pollutants . (s.f.). Recuperado el 26 de May de 2014, de The department od the Environment : http://www.mde.state.md.us/programs/Air/Pages/CriteriaPollutants.aspx
Urban Pollution. (s.f.). Recuperado el 26 de May de 2014, de Protecting Water : http://protectingwater.com/urban.htmlAcid rain. (s.f.). Recuperado el 26 de May de 2014, de U.S ENVIRONMENTAL PROTECTION AGENCY: www.epa.gov/acidrain/what
Acid Rain. (s.f.). Recuperado el 27 de May de 2014, de en.wikipedia.org/wiki/Acid_rain
briney, A. (s.f.). Acid Rain. Recuperado el 27 de May de 2014, de about.com Geography: geography.about.com/od/globalproblemsandissues/a/acidrain.htm
EPA. (s.f.). Recuperado el 27 de May de 2014, de www.epa.gov/region1/eco/acidrain/causes.html