Having lived in Europe since 2000, my feeling is that the euro cannot be supported much longer, with such disparities between the different countries in the eurozone. "sentiment" sounded a little unnatural to me. "Having lived" is much better because you are referring to a time which started in the past and continues to the present. I don't see "disparity" used as an uncountable noun. See http://www.collinsdictionary.com/dictionary/english/disparity "between" is better because each disparity is between only two things. Here, we have a collection of disparities between two countries or groups of countries. For you, "Europe" was "it" but there are many countries in Europe which do not use the euro. The geographical area where the euro is used is commonly described as "the eurozone". I have seen other variations e.g. Eurozone, euro zone, euro area.

There are a couple of conspicuously dangling modifiers. However, that is the kind of mistake that native speakers make all the time and it doesn't sound that bad to native speakers (if they notice it at all). They are horrifying to English teachers, though. They're likely to pull out red pens and give lower grades to papers when they see that error.

Hello Akina san, The guys are not wrong. The sentence should be: having lived in Europe since 2000, my sentiment is that its euro cannot be supported much longer with such disparity among the different countries in it. The second "it" is a pronoun for Europe and not for the euro, for the countries are not in the Euro, but in Europe (Eurozone). Changing "the euro" to "its euro" keeps the main subject intact, and the second "it" accurate. I hope this helps. Aleks

"HAVING LIVED in Europe since .... countries WITHin it" For this sentence to be grammatically correct, it needs to have these changes. Hope that helps! :)

Mohamed and Hermann, thank you guys so much for your opinions (^_^)