Find the difference of the average wet bulb and dry bulb temperatures. Round the value to the nearest whole number. Use this value and the average dry bulb temperature in Celsius (round up or down to the nearest temperature) to determine the relative humidity using this chart.

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

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