Renewable energy sources, such as solar, wind, and geothermal energy, are considered infinite and inexhaustible, making them ideal for supporting the circular economy without concerns about their availability.

In the biological cycle, biodegradable materials are processed and used efficiently, and at the end of their life cycle, they decompose through processes like anaerobic digestion and composting, reintegrating into the natural cycle while maintaining their functional value.

The linear economy is a sustainable model that efficiently preserves resources by minimizing waste and designing products for long-term use and reuse.

The increase in global overproduction is mainly driven by population growth, while individual overconsumption has little impact on resource demand, transportation needs, and packaging waste.

Industry 4.0 introduces cyber-physical systems and smart devices that operate independently without the need for real-time optimization or communication between devices.

Sustainable development can only be achieved if economic growth, environmental protection, and social well-being are considered simultaneously, because focusing exclusively on economic performance while neglecting environmental limits or social equity may increase short-term prosperity but ultimately undermines long-term sustainability.

Explain the concept of sustainability using the three pillars of sustainability (environmental, economic, and social).

Length: 150–200 words.

What was the Environmental Performance Index (EPI) score of Spain in 2024?

Which sustainability-related indices can be used to measure or reflect income inequality within a population? (Select all that apply.)

Which sustainability index combines life expectancy, education, and income?