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Once you digitize data, you can actually analyze patterns and relationships in geographic space - relationships between certain health patterns and air or water pollution, between plants and climate, soils, landscape.

Copenhagen has done a remarkable job creating streets that are focused on bicycles and pedestrians.

Riding a bicycle is the summit of human endeavour - an almost neutral environmental effect coupled with the ability to travel substantial distances without disturbing anybody. The bike is the perfect marriage of technology and human energy.

At the global level, there are a growing number of city-based bike-sharing programs that take advantage of mobile devices to reserve your bike, keep track of it, and collect data that helps to improve the service.

There is a shirt company that is making sensors that go into your clothing. They will watch how you sit, run or ski and give data on that information.

People realised this is real pollution; it is not fog. Now everyone has to face the data and come out of their comfort zone.

Cycling is a great way to learn about your city. I love being outdoors, especially in good weather, but I'm not a fair weather cyclist. I'm happy to get a red nose in the cold.

There is a growing recognition of the importance of really bringing pollution under control.

I love cycling, but if I could find a way of building something above the streets for cyclists, that would be amazing. We need even more space.

The health effects of air pollution imperil human lives. This fact is well-documented.