yes
Yes. A number of European countries are neutral and were neutral during conflicts such as World War II. Ireland, Sweden and Switzerland are three such countries, and there are others.
the goal of every nation was to become as wealthy as possible
You need to specify what you are referring to if you want to make it possible to answer your question.
That is not possible. The European Union is an organisation that has 28 countries that are members. Europe is a continent with about 50 countries. So a large amount of Europe's countries are not members of the European Union and so they cannot participate it the things it does.
Yes in the seven (7) European countries that have legalized same-sex marriage. It is also very likely possible in the fourteen European countries that have legalized some form of registered partnership.
When a constitution needs revision.
It is possible that southern European countries are particularly vulnerable to a strong euro because of the type of products that they produce. These countries traditionally export "low-tech" manufactured items such as textiles, toys, and footwear. These goods are in direct competition with inexpensive goods from China. In the northern European countries the products that are manufactured and exported are rarer and can not be substituted with comparable products from countries like China.
In some European countries it is possible for a 16 year old to buy tobacco, but not others.
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Well that is Tough because a convention is when something unusually happens.
The Basel Convention is the only existing global legal instrument regulating transboundary movements of hazardous wastes. Its provisions ensure protection of countries against uncontrolled dumping of toxic wastes and promote environmentally sound waste disposal and minimization of waste generation. The control system ensures that the Convention does not remain a mere declaration of intentions, but that the rights of countries are respected. It is therefore important that as many countries as possible become parties to the Basel Convention to achieve effective control of transboundary movement and disposal of hazardous wastes worldwide.
The long coastline and accessible water routes make it possible for most European countries to participate in commerce.