This study investigated the attitude of young people (individuals aged 14–25 years old) towards environmental protection using the NEP scale. The research aims to understand how demographic characteristics may influence young people’s attitudes toward green issues. The study focuses on answering the following two research questions: Q1. How can the environmental attitudes of young individuals be systematically characterized and summarized? Q2. To what extent do demographic factors influence the environmental attitudes of young individuals? A computer-assisted data collection (CAPI) method was carried out in four European Capital of Culture cities from different countries (Estonia, Hungary, Lithuania, Romania) from April to June 2022. On the basis of this primary questionnaire survey, descriptive statistics and relationship analyses (Cramer’s V and Kendall’s tau) were used to analyze the collected data (n = 712). The results revealed that in most cases, demographic characteristics had little or no impact at all on green attitudes. Thus, most youth attitudes showed the concept that humanity must adapt to the limits of nature. Furthermore, there were three green attitude statements where moderate differences could be detected by the countries. The findings can provide guidance for decision-makers in the field of environmental education and marketing, and they can also serve as a benchmark for other countries. Additionally, it opens up new opportunities for further research on the role of formal and informal education, as well as to measure the impact of social media on youth environmental behavior and their proactivity towards green issues.