We'll start building that tradition again.

The idea would be to grow this as a major track venue for Central California.

It's an event high schools don't normally hold.

We have to be aware that fossil fuel energy sources have an expiry date. A timeframe of 30, 40 or 50 years can seem a long time to get rewards for economic policy, but it's only a short time for implementing a new energy policy.

Once upon a time there was a piece of wood. It was not an expensive piece of wood. Far from it. Just a common block of firewood, one of those thick, solid logs that are put on the fire in winter to make cold rooms cozy and warm.

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.