This report provides a comprehensive analysis of sustainable systems, focusing on life cycle assessment (LCA) and energy efficiency. The LCA compares plastic and ceramic plates using GaBi software, revealing the environmental impacts of each. The analysis concludes that ceramic plates are more sustainable due to the non-biodegradable nature and harmful emissions associated with plastic plates. The report also includes an energy efficiency analysis of a television set, incorporating a cost-benefit analysis to determine its economic, social, and environmental sustainability. The findings suggest that a television becomes economically beneficial after two years, with manageable environmental impacts. The report emphasizes the importance of sustainable energy sources and practices for home appliances.