Plastics have become an integral part of daily human life for the last 50 years because, due to their durability, low cost and ease of construction, they have replaced many other materials. However, the same characteristics that make plastics particularly desirable are also what make them ubiquitous in the environment, especially as much of the plastic is designed to be discarded almost immediately after use. This study investigates the opinion and behavior concerning the current use of plastics, their end-of-life (recycling) scenario, and the potential for their replacement with more sustainable and biodegradable materials in Greece and Lebanon. The survey was conducted during April and May 2021 in the main cities of the two countries. The data were collected using a structured questionnaire. The questionnaires were analyzed, using simple descriptive statistics, chi-square test and PCA analysis. The results show that even if the respondents of both countries stated significant awareness of environmental issues, they often use single-use plastics. Furthermore, the respondents (in both Greece and Lebanon) say that it would be fair to pay more for products in a package made of biodegradable materials. Finally, the statistical analysis of the results shows that in both Greece and Lebanon, there is a small increase in the use of reusable products during the COVID-19 pandemic compared to before the pandemic.