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    Aug 2 2011: The first step is to ensure the sufficiency of urban energy supply; moreover, this means that there is a need of investment in smart, and secure, electric grids, which are going to support a transition from vertically distributed fossil fuel, to systems of renewable energy.

    Then, the second step is investment on urban argriculture, which is a method who is currently being tested, in countries such as Singapore, and which can minimize the cost of food by eliminating the need for distant transportation; in adiition to that, genetically engineered food, and specifically meat, can make the production of protein based food, conceivable, in an urban environment.

    Finally, water sufficiency can come from two places, and non of them are rain water, because it is clealy insufficient to support the populations of modern megacities. Therefore, cities are going to have to use recycling technologies, to clean, and recycle, the water which has being consumed, and then they need to invest on desalination plans, which are going to allow us to access, the virtually abudant reserves of the oceans of the planet.

    Therefore, in conclusion, the conjunction between smart grids and renewable energy, urban argiculture, disalination, and recylcing, are going to create the cities of the future.
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      Aug 2 2011: Yes! So you are saying enough people are working on solutions and we will all be just fine? I go to learn surfing and chess than.
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      Aug 2 2011: I dont think George's point is that this list of solutions can be achieved easily. But it does point back to this issue if assessing the infrastructure needs of new cities and working better to plan them at the front end of development. To what extent all of the issues raised here can be managed at scale - i am not well placed to judge.

      On the waste point we haven't explored the many and various ways in which that can be managed. It's clear that different categories of waste water can be reused in many different ways - only some of which are currently happening in a few places. Ditto the by-products of refuse - both gas and liquids - which have a role in providing sources for power in models for modern co-generation.
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        Aug 2 2011: Agreed it will not be easy to do,

        I simply wonder on what Lary Page from google once said;

        "If enough people are working on a challenge, the solution will arise".

        Are enough people and companies working effectively on the future of megacities? I read in one of your replies today not enough stakeholders are working together yet so there is the answer.

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