photovoltaics
gregladen | February 26, 2013A big step in improving the efficiency of photovoltaic cells in on the horizon. A paper published over the weekend in Nature Physics describes the ability of a substance called Graphene to convert a high percentage of the energy from sunlight into electricity. Graphene uses more of each photon's energy, and a wider range of photons of different energy levels (using a broad spectrum of the Sun's energy), compared to existing solar cells. From the abstract of the paper:
The conversion of light into free electron–hole pairs constitutes the key process in the fields of photodetection and…
lborkowski | April 6, 2012At an American Public Health Association annual meeting session a couple of years ago, I learned from the panelists that green jobs aren't always safe jobs -- for instance, energy-efficient buildings and wind turbines can be designed without proper consideration for how workers constructing or servicing them will be protected from falls or assured adequate ventilation in confined spaces. The National Institute for Occupational Safety and Health's Prevention Through Design program is addressing these issues and others related to green jobs, but there's still a lot of progress to be made.…