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"the more steps you have in the food chain the more opportunities you have for nutrients to be lost at each stage"

Smartphone apps may be the key to getting people out of their cars and onto mass transit. An interesting study of commuters in Boston and San Francisco found people are more willing to ride the bus or train when they have tools to manage their commutes effectively. The study asked 18 people to surrender their cars for one week. The participants found that any autonomy lost by handing over their keys could be regained through apps providing real-time information about transit schedules, delays and shops and services along the routes. Though the sample size is small, the researchers dug deep into participants' reactions. The results could have a dramatic effect on public transportation planning, and certainly will catch the attention of planners and programmers alike. By encouraging the development of apps that make commuting easier, transit agencies can drastically, and at little cost, improve the ridership experience and make riding mass transit more attractive.

Perhaps lost in the recent debates related to the earthquake and tsunami in Japan is that natural disasters and not nuclear energy should be the focus, says Oak Ridge National Laboratory's John Sorensen, an emergency preparedness expert.

A "bionic" leg designed for people who have lost a lower leg is undergoing clinical trials sponsored by the US Army. The researchers hope the leg will be able to learn the patient's nerve signal patterns and be able to move in response to the patient's own muscles and nerves.

Climate change could mean unthinkable loss for South Africa, which hosts talks on global warming that will bring government negotiators, scientists and lobbyists from around the world to the coastal city of Durban next week. Guy Midgley, the top climate change researcher at the South African National Biodiversity Institute, said evidence gleaned from decades of recording weather data, observing flora and fauna and conducting experiments makes it possible for scientists to "weave a tapestry of change."