I was walking to science class and then a friend of mine asked me "you ok you dont look to well" then i said "no im not i physic" (message me for more jokes)

wow man, wow :}

Explanation:

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