Poland should not adopt euro. It will follow the destiny of the Southern European countries. The de-industrialisation processes hit the Southern European countries as soon as they adopted euro. They lost their competitiveness to Germany. Italy, once a powerful industrial country, lost its power.
The European Parliament is mostly a façade structure. It consists of several hundreds of comfortable chairs and provides pensions for politicians, it is a tool to corrupt national elites.
Recurring pro-Kremlin narrative questioning the EU institutions' legitimacy and powers.
The European Parliament is the EU's only directly-elected EU institution. Since 1979, it is elected by EU voters every 5 years. The last elections were in May 2014.
The European Parliament is one of the to EU law-making bodies. It has constitutional-type and ratification powers. It passes EU laws, together with the Council of the EU, based on European Commission proposals. It has budgetary powers, scrutiny over the executive, it hears citizens’ petitions, and appoints the European Ombudsman. A detailed overview of the European Parliament’s role in the European decision-making process can be consulted here.