Yes, you are. But you need to live in Brazil.
After a year, then, you can apply for Brazilian citizenship.
Yes. U asked the officials ... You can enter brazil with an expired Brazilian passport
You have the right to enter Canada if you are a Canadian citizen. The passport should prove your identification, and the citizenship card should prove your citizenship - my guess is a strong yes.
http://travel.state.gov/law/citizenship/citizenship_781.html
no yo can't
Passports aren't issued by cities, they are issued by countries. In order to have a passport, you need to be a citizen of the country you are applying to. So if you are a British citizen, you get a UK passport, if you are a Canadian citizen, you get a Canadian passport. It doesn't matter where you were born, it's what country you are a citizen. If you don't have citizenship then you cannot have a passport. Ex: A Canadian citizen, who is NOT an American citizen cannot have a US passport.
Maybe there is dual citizenship, but you need to contact passport services to find out.
If you have both citizenship and both their laws allow you to hold both passport then you are legally a dual citizen of the countries.
Have you applied & received citizenship or were you born in America? Then you would be an American Citizen.
If you are a citizen of both countries then you can apply for the dual citizenship so that you can get both passports.
Yes
Usually your passport depends on your citizenship. If you are a citizen of your country, lets say the USA then you have a US passport. You can also have a dual passport, depending on your citizenship again. You might be a naturalized citizen in one country and a citizen by birth in another. Sometimes, people working for the United Nations or a related organization may have passports issued by the UN.
You cannot change your passport. Rather, you can apply for a dual citizenship passport, meaning you will be issued another passport if you are eligible as a citizen of that particular country