One of the challenges with the green building is what to do with older buildings. Everyone lauds these new green buildings. But it takes much more energy to build a new building than retrofit an existing one. If you add in the changes to the commute and likely more time in a car, there is an even greater incentive to retrofit.

Then the question is who pays. Most capital expense like the one at the Empire State Building are paid by tenants as part of the building’s operating expenses. There needs to be a quick return on the expense to justify the cost.

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