It will also depend on the success of competing emission - free technologies — solar, wind, biomass, and fuel cell energy, among others — that promise less environmental impact. (sciencemag.org)
Researchers at the Lawrence Livermore National Laboratory (LLNL) recently developed a working prototype for a portable fuel cell energy source that could power a cellular phone 300 percent longer than existing rechargeable batteries do. (scientificamerican.com)
In the chloroplasts of plant cells the energy of sunlight is transformed into cells these fuels chemical fuels. (scientificamerican.com)