Installing a green roof can contribute to many other LEED credits:

SSc5.1: Site Development—Protect or Restore Habitat 

SSc5.2: Site Development—Maximize Open Space 

SSc6.1: Stormwater Design—Quantity Control 

SSc6.2: Stormwater Design—Quality Control 

WEc1: Water Efficient Landscaping

EAc1: Optimize Energy Performance.