The terms active and passive solar energy both refer to the use of solar energy, but there are significant differences between them. Active solar energy systems refer to technologies that actively harness solar energy, while passive solar energy systems rely more on the use of natural sunlight and heat.

Active solar energy systems usually use solar collectors or solar panels to convert solar energy. Solar collectors convert sunlight into heat, which can then be used to produce domestic hot water or for heating. And solar panels convert solar energy into electricity, which can then be used to power household contribute-to-reducing-the-ecological-footprint/">appliances or be fed back into the grid.

Passive solar systems focus more on the design and construction of buildings to make the best use of natural sunlight and heat. For example, proper siting of buildings, design of windows and shading, and proper insulation all contribute to the harnessing of passive solar energy. Such systems are designed to harness solar energy passively, without the need for active technologies.

Active solar energy systems have the advantage of being able to produce larger amounts of energy and can be used in a wide range of applications. However, these systems are generally more expensive and more complex to install and maintain. Passive solar systems, on the other hand, are simpler and cheaper, but can produce less energy.

Overall, active solar energy systems actively harness solar energy, while passive solar energy systems rely more on the use of natural sunlight and heat. Both approaches have advantages and limitations, and the choice depends on the specific needs and possibilities.

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