Of the following types of energy production, which emits the highest amounts of greenhouse gases?

Hydroelectric power is generated by harnessing the energy of flowing water, producing electricity without burning fossil fuels. As a result, it emits negligible amounts of greenhouse gases during operation. While there are emissions related to construction and maintenance, these are minimal compared to the emissions from fossil fuels.

Nuclear energy is produced through fission reactions and does not emit greenhouse gases during operation. Although there are emissions associated with the mining, construction, and decommissioning of nuclear plants, these are considerably lower compared to those from fossil fuel sources, making nuclear a low-carbon energy option.

Geothermal energy harnesses heat from the Earth’s interior to generate electricity and typically results in low greenhouse gas emissions. While some emissions occur during the drilling and operation phases, they are minimal when compared to the emissions from fossil fuel energy production.