Athens is affected by the urban heat island effect in some areas which is caused by human activity, altering its temperatures compared to the surrounding rural areas, and leaving detrimental effects on energy usage, expenditure for cooling, and health. The urban heat island of the city has also been found to be partially responsible for alterations of the climatological temperature time-series of specific Athens meteorological stations, because of its impact on the temperatures and the temperature trends recorded by some meteorological stations. On the other hand, specific meteorological stations, such as the National Garden station and Thiseio meteorological station, are less affected or do not experience the urban heat island.