The city hall of Greensburg will be considered a hybrid building. List two of the building systems that will make up the sustainable portion of this hybrid building.

The building systems that will make up the sustainable portion of the city hall of Greensburg as a hybrid building are:

1. Ground source heat pumps

2. Vegetated roof with rooftop photovoltaic (PV) system

Explanation:

The city hall of Greensburg relies on renewable energy sources for all the hybrid building's energy needs.  The architectural features of a hybrid building serve the city context and the architectural designs aimed at building sustainable communities. With its ground source heat pumps and vegetated PV roof, the city hall of Greensburg will indeed be considered a hybrid building in the real sense.  This project came after the 2007 massive tornado that destroyed the city, and as a result, city and community leaders have demonstrated their commitment to rebuilding the town as a model sustainable rural community.