Alexandria’s James K. Polk Elementary has installed a vegetative roof (above), renewable energy heating and cooling system with on-site geothermal wells, a fresh-air intake system and solar panels. (By Dayna Smith/The Washington Post)

Find the answers to these questions and test your knowledge of local eco-friendliness by taking the quiz below.

See Christy Goodman’s article in Thursday’s Local Living section for more on the local green building movement.

Then, tune in for a live chat Thursday at 11 a.m with Stuart Freudberg, director of environmental programs at the Metropolitan Washington Council of Governments, an association of 21 local governments in the D.C. region. At COG, he directs a staff of engineers, scientists, planners and support staff that work on a variety of environmental issues, including energy planning, climate change, water resources, air quality and solid waste.Submit your questions now.