Urban heat island: refers to the phenomenon that with the rapid expansion of the city, the temperature of the city is significantly higher than that of the surrounding suburbs. On the near-surface atmospheric isotherm map of meteorology, the temperature change in a wide area on the outskirts is small, like a calm sea, The urban area is an obvious high temperature area, like an island protruding from the sea. Because this island represents a high temperature urban area, it is vividly called an "urban heat island". Based on the above definitions, Which of the following is incorrect:. ['The heat island effect not only changes the climate of the city, but also brings serious pollution, which has become an important factor affecting the environmental quality of the city.', 'In general, the larger the city, the denser the population, and the more obvious the heat island effect.', 'The urban heat island effect is related to the "greenhouse effect" produced by motor vehicles, industrial production and crowd activities.', 'In the city, adding roads, squares, stadiums and other public facilities will help alleviate the heat island effect.']