Final answer:
Solar power, wind power, hydropower, and geothermal power are four types of renewable energy sources used in smart cities. Each source has its advantages and challenges.
Step-by-step explanation:
Four Types of Renewable Energy Sources:
- Solar Power: Solar power uses sunlight to generate electricity through photovoltaic panels or concentrated solar power systems.
- Wind Power: Wind power harnesses the energy of the wind to produce electricity using wind turbines.
- Hydropower: Hydropower utilizes the energy of flowing or falling water to generate electricity by spinning turbines.
- Geothermal Power: Geothermal power taps into the Earth's heat to produce electricity through geothermal power plants.
Advantages and Challenges:
- Solar Power: Advantages include abundant sunlight, clean energy, and decreasing costs. Challenges include intermittent availability and high initial installation costs.
- Wind Power: Advantages include unlimited wind resources, no air pollution, and decreasing costs. Challenges include intermittency, visual impact, and noise.
- Hydropower: Advantages include high energy output, reliable power, and flood control. Challenges include environmental impact, habitat disruption, and limited availability of suitable sites.
- Geothermal Power: Advantages include low emissions, constant power output, and long lifespan. Challenges include limited geothermal resources and high upfront costs.