In the lecture, the speaker casts doubts on the point in the reading passage that there are many advantages of green roofs at which many plants are planted on the top of buildings.
First, in the reading passage, the writer mentions that green roofs can make a room for building new parks in the cities. Meanwhile, the speaker says that, contrary to the reading passage, even if green roofs provide space which can be used as parks and many green roofs are increasing, since people cannot have acess on them well for the reason that they do not work at the buildings having a green roofs, the advantage is not meaningful.
Secondly, it is claimed in the reading passage that green roofs which have various fresh plants such as flowers, trees and grass can give people pleasure of appreciating the views. In contrast, the writer asserts that people cannot see the spectacle of it in that they usually walk under the building.
Finally, according to the reading that green roof can play a crucial role in reduction of the waste of energy by keeping the climate of buildings appropriate. However, the speaker argues that the green roof requires much money because the costs of installing and maintaining green roofs outweigh those which are reduced by saving energy. |