How PPAs – purchase power agreements – work
A current map of the U.S. shows an odd fact: that the number of solar kilowatt hours being produced by state does not correlate where the...
Straw, mud and pumice as building materials (very green!)
A lot of what we now consider green building materials and practices really go back to the days when, prior to mechanical air...
Net-zero luxury homes – They're possible and instructive
Marc Rutenberg Homes is proving that net-zero-energy homes are possible -- in Tampa, in a luxury format, with 4,000 - 7,000 square feet...
Philly's Ridge Flats a large-scale net-zero development
The prevailing thinking is that ultra-green building requires expensive and exotic technology. But developer Onion Flats is figuring out...
Office extension a vegetated roof
OK, so the idyllic weather in Mountain View, California has its advantages – which include team meetings or solitary "think space" on the...
Chicago's "Complete Street" takes on heat, stormwater, blight and unfriendly traffic
With 23 percent of Chicago's land area dedicated to the public right-of-way (streets and sidewalks), those hard surfaces play a huge...