Currently, we cannot develop on the hills, because the current technology at hand is not allowing us to develop higher than the level of the water reservoirs. But after 2015, we will have technology at hand to allow us to develop on the hills. This will give scope to the year 2020.

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The main economic factor that drives densification is when the cost of the land is higher than the cost of the building on it. Then, the building should be demolished to give way to a new one.

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