## 3 Results
### Tool Review
* Life cycle impact, which strongly encourages the assessment of design and construction impact through LCA tools. * Water management and reuse, which typically refers to strategies to reduce landscape watering needs or indoor freshwater use by means of flush reduction technology or reuse strategies. * Waste management addresses CDW flows and destinations, encouraging selective demolition or at least waste differentiations. * Flexibility and adaptability support the adoption of design practices and choices that are adaptable to future changes and requirements. * Disassembly, which includes credits related to construction strategies and technologies easy to disassemble in the future, particularly using precast components and dry systems. * Excavation soil reuse encourages the reuse of excavated soil on site for other functions, such as backfilling, among others. \begin{table}
\begin{tabular}{c c c c} \hline \hline  & & \multicolumn{2}{c}{**LEED New Construction V4 [(86)]**} \\ \hline
**Category** & **Prereq.** & **Credit** & **Metrics** \\ \hline Sustainable Sites & & Rainwater Management & Percentile of Rainfall Events & 80 th/90 th Percentile \\ \hline Water Efficiency & yes & Outdoor Water Use Reduction & Reduced irrigation & Reduce the project’s landscape water requirement by at least 30\% from the calculated baseline for the site’s peak \\ \cline{2-4}  & yes & Indoor Water Use Reduction & Building Water Use & Reduce aggregate water consumption by 20\% from the baseline \\ \hline \hline \multirow{4}{*}{yes} & \multirow{4}{*}{Storage and Collection of Recyclables} & Provide dedicated areas accessible to waste haulers and building occupants for the collection and storage of recyclable materials for the entire building. Collection and storage areas may be separate locations. Recyclable materials must include mixed paper, corrugated cardboard, glass, plastics, and metals. Act appropriately for the safe collection, storage, and disposal of two of the following batteries, mercury-containing lamps, and electronic waste. \\ \cline{2-4}  & & Percent of existing walls, floors and roof reuse by project area & 15–30–45–60–75\% \\ \cline{2-4}  & & Maintain Interior Nonstructural elements for at least 30\% of the entire completed building, including \\ \cline{2-4}  & & Reduction & Elements (1 point) & additions. \\ \cline{2-4}  & & Whole-Building Life Cycle Assessment &
\begin{tabular}{c} Conduct a life cycle assessment of the project’s structure and enclosure that demonstrates a minimum of 5–20\% reduction, compared with a baseline building in at least three of the six impact categories. \\ \end{tabular} \\ \cline{2-4}  & & & Use products sourced from at least three different manufacturers that meet at least one of the responsible sourcing and extraction criteria below for at least 15/30\%, by cost, of the total value of permanently installed building products in the project (1 or 2 points). \\ \hline \multirow{4}{*}{yes} & \multirow{4}{*}{Construction and Demolition Waste Management} & Diversion & Diverat at least 50\% of the total C\&D materials from landfills and incineration facilities. \\ \cline{1-1}  & & & Salvage or recycle at least 50\% of renovation and demolition debris and utilize waste minimizing design strategies and construction techniques for new construction elements. Divert at least 50\% of all renovation and demolition waste, if any. \\ \hline \hline \end{tabular}
\end{table} 
Table 4: CE credits in LEED rating system. * Land use, with a preference for brownfield redevelopment rather than using new uncontaminated soil. Notably, the DGNB protocol, compared to the others, contains a list of criteria to which circular economy bonuses can be attributed, encouraging their use. Despite their presence in each protocol, the number and weight of CE-related credits per category may vary significantly. Figure 7 illustrates briefly how different evaluation categories related to CE are weighted in the diverse ratings (i.e., the wider the line, the higher the relative weight assigned, or the number of credits related).