The use of solar energy or sunlight to heat buildings. Traditional approaches to heating buildings have relied heavily on passive solar heating, particularly in sunny places. More recently, technologies have been developed to pump heat around buildings, using active solar heating or passive solar heating. There is great scope for expanding the use of solar heating systems because the energy supply is inexhaustible and the technology is already fairly well developed and is likely to become cheaper and more efficient in the future. This type of energy use produces less pollution than burning fossil fuels or running nuclear reactors and most places receive enough sunlight to make this approach possible, even if it supplements other types of heating systems that can be switched on when there is insufficient sunlight.
Subjects: Environmental Science.