Recent controversies between richer and poorer members of the European Union have largely centered around issues such as the cost of caring for refugees and the use of the euro.
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Cost of caring for refugees: The influx of refugees, particularly during crises such as the Syrian civil war, has led to significant debate within the EU. Wealthier countries often bear the brunt of the costs associated with resettlement and integration, which can lead to tensions with poorer member states that may already be struggling with their own economic challenges.
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Use of euro: The eurozone crisis highlighted disparities between richer and poorer EU countries regarding fiscal policies and economic stability. Wealthier nations often have more stable economies, while poorer countries facing economic difficulties may struggle under the constraints of the eurozone, leading to calls for reforms or even withdrawal from the euro by some member states.
While factors like the decline in fertility rates and the use of nuclear energy are relevant discussions in Europe, they have not been as contentious between richer and poorer member states in the same way as the aforementioned issues.