Like a tracer running through the veins of the city, networks of air quality sensors attached to bikes can help measure an individual's exposure to pollution and draw a dynamic map of the urban air on a human scale, as in the case of the Copenhagen Wheel developed by new startup Superpedestrian.
I haven't lived in Sweden since I was a teenager. We lived in southern Sweden, about two hours north of Copenhagen, where my family's home base has been since 1970. Our parents bought a schoolhouse in preparation for self-sufficient living. They wanted to create a place to do all the things they believed in.
If Copenhagen were a person, that person would be generous, beautiful, elderly, but with a flair. A human being that has certain propensities for quarrelling, filled with imagination and with appetite for the new and with respect for the old - somebody who takes good care of things and of people.
Copenhagen has done a remarkable job creating streets that are focused on bicycles and pedestrians.
For years, whenever I'd been travelling and came back to Copenhagen, I'd think: 'People are so stylish.' And it's not any one class. It's everyday life.
In Copenhagen, there's a long-term commitment to creating a well-functioning pedestrian city where all forms of movement - pedestrian, bicycles, cars, public transportation - are accommodated with equal priority.
I was born in Copenhagen, and when I was a year old, we moved to Bangalore. I was always a shy person and was happy with just a few friends and that came from my own social awkwardness. I did not know how to make conversations.
Where I come from, it's a little bit like England. We start from the theater, and we do films a bit on our free time. The history of making films in Scandinavia is so old, it's like the oldest. The Nordic film industry started before Hollywood in Stockholm in Copenhagen.
After the ignominious collapse of the Copenhagen global climate change summit in 2009, Bolivia organised a People's Summit with 35,000 participants from 140 countries - not just representatives of governments, but also civil society and activists.
I am flying back to New York as I write this. I will never forget these wonderful 35 days and I would go back to Copenhagen in a heartbeat to work there again.