Final answer:
The most highly weighted LEED impact category is Energy and Atmosphere, while the category with the lowest score is Regional Priority.
Step-by-step explanation:
The most highly weighted LEED impact category is the Energy and Atmosphere category. This category has the highest score because it focuses on the energy performance and efficiency of a building. It includes factors such as energy use, renewable energy sources, and greenhouse gas emissions. The high weighting of this category reflects the importance of reducing energy consumption and promoting sustainable energy practices in buildings.
On the other hand, the category with the lowest score is the Regional Priority category. This category considers regional environmental priorities and encourages projects to address specific concerns in their area. It has a lower score because it may vary depending on the location of the building and specific regional challenges.