There is a lot being said about climate change and ways that we can be a part of the solution. I don’t think I will ever have plants growing on my roof. Our growing season is very short and it doesn’t seem practical. I am certainly not opposed to others doing it.
I would think you would have to purchase a specialized insurance package to cover the roof that is covered in plants and trees. I do find the theory interesting.
We should all be concerned about keeping our planet clean and thriving. I don't go over the top and I will probably never have a roof covered with something growing. It doesn't seem practical where I live. However, I do find it interesting. I imagine in this dwelling it would be very dark.