What are the differences between synthetic cork and natural cork in terms of their environmental impact and performance as wine bottle stoppers?

Synthetic cork is typically made from plastic materials, which can have a higher environmental impact due to the use of non-renewable resources and potential for pollution during production. Natural cork, on the other hand, is harvested from cork oak trees in a sustainable manner, making it a more eco-friendly option. In terms of performance, natural cork is known for its ability to create a tight seal in wine bottles, allowing for proper aging and preservation of the wine. Synthetic corks may not provide the same level of breathability and can sometimes lead to issues with wine spoilage.