Blue Green is one of my favorite words to describe the approach that Sola Roof takes to technology. It means using a combination of "water working" (the Blue) and living plants (the Green) as a low tech solution for Eco Living. A Blue Green solution as relates to Architecture would establish an Arcology for building design and construction. This is a synthesis of Architecture and Ecology that will enable our "built environment" to produce all the necessities of life support: food, water and energy, including biomass for nutrients. These are produced from the higher plants and from algae.
There is much more about this subject in the main Sola Roof wiki where you can look at the Blue Green page and many related pages including: