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Applied sciences and engineering/Engineering/Electrical engineering/Electrical power/Power systems/Fuel cells/Microbial fuel cells

Renewable-energy technology is advancing, but improvements in efficiency are a major factor in curbing society’s growing appetite for energy, experts told a AAAS audience.

Depending on lifestyle and consumption patterns, each person on the planet can generate tons of waste over the course of his or her life. The total amount of trash skyrockets with the farm, mine, and industrial wastes generated during the production of food, power, and consumer items.

“Working with Waste,” the 10 August special issue of Science, highlights the fact that trash can often be turned into treasure—a feedstock that the human race can’t afford to overlook as a burgeoning world population tries to use (and reuse) its resources more efficiently.