Fossil fuels are non-renewable energy sources because they are formed from the remains of ancient plants and animals that have been buried and subjected to high pressure and temperature over millions of years.

Hydropower is the most water-intensive energy source because it requires the construction of dams and reservoirs, which can displace people and disrupt ecosystems.

Hydropower is the process of using water to generate electricity. It is a renewable energy source that does not produce greenhouse gases.

Hydropower is not a reliable source of energy because it depends on the availability of water. During droughts, hydropower plants may not be able to generate electricity.

Thermal power is the process of using heat from the Earth to generate electricity. It is a non-renewable energy source because it relies on the burning of fossil fuels.

Thermal power is not a clean energy source because it produces greenhouse gases, which contribute to climate change.

Nuclear power is the process of using nuclear fission to generate electricity. It is a non-renewable energy source because it relies on the use of uranium, which is a finite resource.

Nuclear power is not a clean energy source because it produces radioactive waste, which is difficult to dispose of safely.

Solar power is the process of using the sun's energy to generate electricity. It is a renewable energy source that does not produce greenhouse gases.

Solar power is not a reliable source of energy because it depends on the availability of sunlight. During cloudy days or at night, solar power plants cannot generate electricity.

Wind power is the process of using wind energy to generate electricity. It is a renewable energy source that does not produce greenhouse gases.

Wind power is not a reliable source of energy because it depends on the availability of wind. During calm days, wind turbines cannot generate electricity.

Solar power is the most sustainable energy source because it is a renewable energy source that does not produce greenhouse gases.

Thermal power is the most cost-effective energy source because it is a reliable source of energy that can be generated on a large scale.

Thermal power is the most reliable energy source because it is not dependent on the availability of water, wind, or sunlight.