por qué los problemas causados por la contaminación atmosférica afectan a todo el planeta y no solo al lugar donde se produce?

Air masses are characterized by various properties including temperature humidity air temperature pressure and wind speed . which of the following air masses is associated with low relative humidity and high temperature

Can someone me choose a broad topic and area of focus i am really doing this as a tally to see which one most people pick ok water pollution global warming endangered species atmosphere for the !

In a class of 20 students, what democratic form of governance makes the most sense