WC- Im glad you wrote about this.
Many places in the world have "green roofs"
basically- its a roof that has grass. There are two types of green roofs...(intensive and extensive)
one supports only grass, and small shrubs, while the other supports everything.
Because of all the pollution in a city, the heat gets trapped causing (dont quote me, but correct me if I am wrong) something called the "urban jungle effect". As a result, many buldings now have green roofs, because it helps reduce carbon emmisions as well. It also helps with flooding. Think about this for a moment...grass needs water to live...if it rains too much, the grass shall only get greener...saving our city streets, and our pocket change (lets face it...nobody likes taxes). AND BONUS- Oxygen!!!!!
Personally- I think it is sad how people take advantage of our earth.



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