I would recommend not getting a green roof because it’s not really economical and environmental it isn’t that great either. Economical, unlike most green projects, there really is no return of your money once you invest your capital. Environmental, just think of all the materials you’re going to have to put into it. Fertilizers in the soil for at least the first couple years, if not more, to get all the vegetation started up. Soil, which is a *non-renewable* resource because it can take up to 1000 years to make just 2 inches of good, fertile soil. Then keep in mind all the machinery involved just to keep it looking good. Small motors are absolutely horrible for the environment (in fact, mowing an average sized lawn releases just as many pollutants as driving a car from NY to CA).

I’m not completely sure if there are alternatives to green roofs. If you could find some way to combat the things listed above, I think green roofs would be fine.

The decay of plants/trees happen naturally in nature, and since we’re destroying so much of it already, adding a green roof here and there won’t make much of a difference (good or bad). Ozone is destroyed through the release of CFCs, halogens, and other such chemicals, so the decomposition would not harm the ozone layer.