merged alan's work

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diff --git a/doc/build/pdi.pdf b/doc/build/pdi.pdf
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diff --git a/doc/tex/introduzione.tex b/doc/tex/introduzione.tex
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@@ -133,6 +133,22 @@ one \cite{swisseconomy} with a market price of 1'996'804 millions of Canadian
 dollars \cite{statscan:ecoimpexps} which roughly equals to 1.54 millions of
 million of Swiss francs. 
 
+Canada is more open than his neighbour USA, it has policies of protection and
+prevention, like health insurances and pension plans for who gets older and
+can't work these are mandatory, much like they are in Switzerland.  A very hot
+topic right now is immigration and people fleeing from war. In Canada they aim
+to help the war refugees to start a new life. Canada was the first country in
+the world to adopt multiculturalism as an official policy. With no pressure to
+assimilate and give up their culture, immigrants freely choose their new
+citizenship because they want to be Canadians. As Canadians, they share the
+basic values of democracy with all other Canadians who came before them.
+Although Canada has two official languages (English and French), more than 200
+languages were reported in the 2011 as a home language or mother tongue.  17.5
+percent reported speaking at least two languages at home.  
+
+% as seen in these graphs the ethnic diversity is
+% very high.
+
 \section{Natural resources}
 Canada's huge land area makes it one of richest countries from a natural
 resources standpoint. Indeed Canada has the third largest reserve of crude oil