A green roof, or 'living roof' really helps regulate the temperature of a house or building, keeping it cooler in the summer and warmer in the winter. You can even graze your goats on them! Indeed: goats can climb ladders, they are quite agile!
This is Leanach Farmhouse in Scotland. At years old its wonderful history is told by the stones, clay and oak that have kept it standing for so many centuries. In this picture the beautiful cottage is getting a new haircut of a red heather thatch.