Meteorologists have found that the temperature in densely populated or industrialized areas is regularly several degrees higher than it is in the surrounding countryside.
當然，這種多熱齊下的情形，「並非台北特有的現象」，姜善鑫教授表示，根據氣候學家的研究調查發現，凡是人口愈多，愈都市化的大城或工業區，因為每天製造的熱能比鄉村多，溫度一定比鄰近的鄉村高幾度。