Within the sludge of wastewater treatment plants is an invisible world teeming with microbes. Here, diverse species of bacteria convert solid and liquid wastes into gases, some of which contribute to global warming. Two Stanford University engineers are developing a new sewage treatment process that would actually increase the production of nitrous oxide (“laughing gas”)… »

There are many power sources today as wind power, hydro-power, tidal, geothermal, solar power as well as the power used in wristwatches, where oscillations that occur while we move our hand power the watch. Researchers from the University of Michigan are developing a similar, more sensitive, technology. Their small generators could produce enough electricity from… »