Which of the following is an example of cogeneration? A. A power plant uses water to cool electricity-generating turbines, then lets the hot water cool in large cooling ponds. B. A power plant burns coal to produce electricity, and uses "scrubbers" to reduce pollution. C. A power plant takes steam left over after electricity production and uses it to heat buildings. D. A power plant uses water to cool electricity-generating turbines, then releases the hot water into a nearby lake.

Cogeneration is defined as the usage of heat energy along with electricity. Cogeneration depends on the following:-

According to the question, the correct option is A that is A power plant that uses water to cool electricity-generating turbines, then lets the hot water cool in large cooling ponds.

In the water turbines, the motor produces electricity, and that energy is used up by the engine and converted into heat.

Hence, by this way we can use two energy simultaneously.

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C. A power plant takes steam left over after electricity production and uses it to heat buildings.

Explanation:

Cogeneration is defined is defined as the joint production, in a sequential process, of electricity and useful thermal energy from a single energy source.

-Simple put, electricity and heat are made at the same  as with C, where left over steam is used to heat buildings.

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