## 4 Discussion
(2018) indicated in their review on the subject that literature on PUSWCS is scarce, so the analysis must be contextualized under this premise, and there is a need to expand knowledge in this field. Although PUSWCS users lack information about the energy consumption of each waste collection system, studies by [PERSON] et al. (2018), [PERSON] et al. (2018), and [PERSON] et al. (2018) concluded that this variable is crucial for evaluating the environmental impact of different collection systems. Nevertheless, technicians with detailed information on the energy costs of systems in their municipalities consider this solution favorable. Additionally, energy costs from renewable sources would reduce greenhouse gas emissions. Other positive \begin{table}
\begin{tabular}{c c} \hline \hline
**Variable of the Selection Matrix** & **Associated SDGs** \\ \hline Cost and hassle of implementation & 7, 8, 9, 11 y 12 \\ Operation cost & 7, 8, 9, 11 y 12 \\ Selective quality & 3, 6, 7, 8, 9, 11, 12, 13,14 y 15 \\ CO\({}_{2}\) and GHG emissions & 3, 6, 7, 9, 11, 12, 13,14 y 15 \\ Circular economy & 3, 6, 7, 9, 11, 12, 13,14 y 15 \\ TOD & 3, 6, 7, 9, 11, 12 y 13 \\ Noise & 3, 8, 9 y 11 \\ Quality of life & 3, 7, 8, 9, 11, 12, 13, 14 y 15 \\ Odors & 3, 6, 7, 8, 9, 11, 12, 13, 14 y 15 \\ Employment impact & 3, 8, 9 y 11 \\ SMART (Tracking, Real-Time Weighing, and Pay Per Generation) & 3, 9, 11, 12 y 13 \\ Favorite residue fraction system & 3, 7, 9, 11, 12, 13, 14 y 15 \\
24-7-365 & 3, 7, 8, 9, 11 y 12 \\ Affection strikes & 3, 8, 9 y 11 \\ Citizen acceptance & 3, 7, 8, 9, 11, 12 y 13 \\ Vandalism & 3, 8, 9, 11, 14 y 15 \\ Sustainability & 3, 6, 7, 8, 9, 11, 12, 13, 14 y 15 \\ Occupation of public roads & 3, 6 y 9 \\ Direct contact with waste & 3, 6, 8, 9 y 11 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Correlation between study variables and SDG with which they interact. variables, well-received by system users, include convenience, hygiene, aesthetics, reduced traffic, and less dependency on collection during adverse weather conditions. A significant disadvantage not perceived by system users but noted by competent technicians is the pipe blockages that require system interruption for maintenance and the lifespan of the pipes used for PUSWCS, as noted by [PERSON] et al. [21]. This opens a new research avenue to increase the lifespan of pipes and reduce mechanical wear caused by waste, which could alter the projected operation and maintenance costs during the system's lifespan. In summary, PUSWCS are well-perceived by system users and competent technicians, aligning with the SDGs analyzed in our study, making them a potential solution for municipal waste management in future cities. PUSWCS play a role in advancing the SDGs by promoting sustainable urban development, improving public health, fostering responsible waste management practices, and contributing to climate action. However, it is essential to have a tool to study whether the installation of such urban solid waste collection systems is suitable in a specific urban environment with its socioeconomic conditions, considering the specific context and design of each system to maximize its positive impact on the SDGs.