A greenhouse is an example of a microclimate. A greenhouse absorbs the heat of the sun and then releases it slowly over time. Greenhouses are used in areas where it is too cold to grow plants that require extra warmth.
A microclimate is a change in the climate of an area as small as a few square feet to as large as many square miles. Microclimates can occur naturally. For example, they may occur near a lake or river where the atmosphere is cooled from the water. They can also be man-made. For example, asphalt absorbs the sun's energy, warming an area.