Michael Dudley

A New Zealand inventor has built a track for the world's first human-powered monorail called the Shweeb as part of an amusement park [Video]

While it didn't transform personal mobility and lead to the redesign of urban areas, the Segway has found some unexpected forms of popularity.

In this review of James Lovelock's new book "The Vanishing Face of Gaia", Alexander Zaitchik explains the author's view that, while nothing can be done to stop climate change, there is reason to believe that some form of civilization will survive.

The New Economics Foundation's "Happy Planet Index" shows that Costa Ricans use fewer resources and lead happier lives than the rest of the world.

World Watch magazine's "Vital Signs" section highlights global bicycle production and documents trends in cycle transportation, noting effects of energy costs and commodity prices.