The word “harness” in the passage is closest in meaning to
正确答案：B
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Microbial Fuel Cells
Microbial fuel cells (MFCs) are an innovative technology that uses bacteria to generate electricity. MFCs harness the natural abilities of microbes to break down waste materials and, in the process, release energy. The concept of using bacteria for power is not new, but recent advances have made MFCs more efficient and practical for broader applications.
Inside MFCs, microbes “eat” things like food waste, and during this digestion, they release tiny particles called electrons. These electrons move through the system in a controlled way, creating an electric current. How well the system works depends on the type of bacteria and how the device is set up. Some types of bacteria are especially good at passing these electrons along, and scientists are always looking for better combinations. One particular type, called Geobacter sulfurreducens, has become famous for its remarkable ability to share energy with the system.
One of the most promising applications of MFCs is in wastewater treatment. Traditional methods of treating wastewater are energy-intensive, but MFCs can treat wastewater while simultaneously generating electricity. This dual function makes them an attractive option for sustainable waste management. MFCs also have potential applications in remote areas where access to conventional power sources is limited.
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