Curitiba in Brasil is the winner 2010 of sustainable city in the world. The city has shown evidence in sustainability in energy, water, production and transportation  business.

These factors are crucial for running a city, i.e 70 % of the global energy is used just to run all cities. Íf we take care of the heat from those operations it can be used to heat up buildings etc. and be a asset instead of waste.


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