This is kind of what I imagine the future being, since we will need housing for the growing population, so instead of getting rid of greenry all together to make room, we will have green roofs everywhere! so when you take a stroll it will be from roof to roof, and with all the greenry, it will clean the toxics in the air! Hopefully I can work on a project like this in school.

Green roofs may be a newer phenomenon in many places, but Norwegians have been planting greenery atop their houses for hundreds of years. Some have flowers mixed in with grass, and a few even have small trees. The verdant roofs have many advantages like the fact that they help stabilize homes, provide good insulation and are long-lasting.