1- http://www.wisegeek.com/what-is-a-natural-disaster.htm = What is Natural disaster
2- http://www.ehow.com/about_5444212_effects-natural-disasters.html = Effects of Natural disasters
3- http://assets.opencrs.com/rpts/R41702_20110331.pdf = Effects of tsunami in japan
4- http://www.gsa.org.au/resources/factites/factitesTsunami.pdf = What cause a tsunami
5- http://www.globaleducation.edna.edu.au/globaled/go/pid/308 = How can we prepare for natural disaster
2- http://www.ehow.com/about_5444212_effects-natural-disasters.html = Effects of Natural disasters
3- http://assets.opencrs.com/rpts/R41702_20110331.pdf = Effects of tsunami in japan
4- http://www.gsa.org.au/resources/factites/factitesTsunami.pdf = What cause a tsunami
5- http://www.globaleducation.edna.edu.au/globaled/go/pid/308 = How can we prepare for natural disaster
