Natural gas is a fossil fuel and is not a renewable energy source.

Solar energy does not produce greenhouse gases, making it an environmentally friendly energy source.

China is the global leader in wind energy production, accounting for over 30% of the world's total wind energy capacity.

Hydropower projects can have a negative impact on aquatic ecosystems, including fish populations and water quality.

Biomass gasification is a process that converts organic matter into biogas, which can be used as a fuel.

Geothermal energy is a reliable source of energy as it is not affected by weather conditions.

Solar photovoltaics involve the direct conversion of sunlight into electricity using photovoltaic cells.

Wind energy is intermittent, meaning it is not always available when needed.

Wave energy involves the use of ocean waves to generate electricity using wave energy converters.

Tidal energy is a reliable source of energy as it is predictable and consistent.

Ocean thermal energy conversion involves the use of temperature differences in the ocean to generate electricity.

Biomass energy can have a negative impact on air quality due to the emission of pollutants such as particulate matter and nitrogen oxides.

Anaerobic digestion involves the use of bacteria to convert organic matter into biogas.

Renewable energy sources do not produce greenhouse gases, making them environmentally friendly.

Geothermal power plants use heat from the Earth's interior to generate electricity.