Resumen

This study analyzes the implementation of sustainable practices in five households over a five-month period, focusing on three axes: waste separation, use of reusable bags, and responsible consumption. Baseline and final surveys were administered, monthly follow-ups were conducted, and an economic exercise compared the cost of “non-responsible” purchasing options versus more sustainable alternatives. Results show that four out of five families reduced their use of single-use plastic bags to near zero, decreased weekly household waste, and increased waste separation. In addition, all families recorded economic savings associated with responsible consumption: the September analysis indicates an average saving of approximately 28–30% in the categories assessed. This suggests that consumption choices aligned with SDG 12 involve not only a lower environmental impact, but also household economic efficiency. Finally, we propose that accounting can function as a pedagogical tool: quantifying waste avoided and money saved supports informed household decision-making and links day-to-day behavior with environmental and financial consequences.