1. Green roofs are most valuable when _________________.
A. they provide a useable and pleasant space for tenants that used to be a hot roof
B. rainwater collection is impractical and the FM wants to limit water going to the storm sewer
C. winters are long and building heating is required for most of the year
D. they collect drinking water
2. Green walls __________________.
A. shade exterior walls
B. mitigate temperature fluctuations on exterior wall surfaces
C. limit exterior wall heat rise through evaportranspiration
D. all of the above