Fossil fuels, such as coal, oil, and natural gas, are non-renewable energy sources because they are formed from the remains of ancient plants and animals over millions of years.

Solar energy has the highest potential for electricity generation due to the abundance of sunlight and the continuous advancements in solar technology.

Wind energy has a more consistent power output compared to solar energy, as wind turbines can generate electricity even during cloudy or nighttime conditions.

Pumped hydro storage is the most widely used energy storage technology for grid-scale applications due to its high efficiency, long lifespan, and ability to store large amounts of energy.

The intermittency of renewable energy sources, such as solar and wind, poses a challenge in maintaining grid stability and reliability.

Insulation is a widely used energy efficiency measure in buildings as it reduces heat transfer through walls, ceilings, and floors, leading to lower heating and cooling costs.

Energy conservation aims to reduce energy consumption by implementing measures that minimize energy waste and promote efficient energy use.

Energy efficiency measures typically lead to reduced energy consumption and lower greenhouse gas emissions, not increased emissions.

Sustainable energy systems aim to minimize environmental impact by reducing greenhouse gas emissions and promoting the use of renewable energy sources.

Fossil fuel power plants are not a key component of sustainable energy systems due to their contribution to greenhouse gas emissions and their non-renewable nature.

The high cost of renewable energy technologies, compared to conventional fossil fuel-based energy sources, is a major challenge in the development of sustainable energy systems.

Sustainable energy systems aim to reduce the depletion of natural resources by promoting the use of renewable energy sources and energy efficiency measures.

Energy storage plays a crucial role in sustainable energy systems by balancing the intermittency of renewable energy sources, such as solar and wind, and ensuring a reliable and stable power supply.

Thermal energy storage is not a type of energy storage technology, but rather a method of storing thermal energy for later use.

Energy policy in the context of sustainable energy systems aims to promote renewable energy, reduce greenhouse gas emissions, and ensure energy security.