The effect of urbanization on temperature is relatively well-known: cities are often measurably warmer than their surrounding rural areas. This is called the urban heat island effect. What fewer people know is that the urban heat island has a twin counterpart with similarly important consequences: the urban precipitation anomaly, where the presence of urban development measurably affects the amount of rainfall in an area.
Is it because of pollutants? Like it you are out in sub 40, you can’t really see your breath if you are in the middle of nowhere. But then a snowmobile comes by and your breath gets visible.