Why is it important for people to understand how interacting air masses can affect the weather?

Climate is the statistic of atmospheric weather, usually over an interval of 30 years. [1] It is measured by assessing patterns of variation in temperature, humidity, atmospheric pressure, wind, precipitation, atmospheric particle count and other meteorological variables in a given region over long periods. The weather differs from the weather, in that the weather only describes the short-term conditions of these variables in a given region.