<span>These three should be the most pressing problems
-illegal immigration
</span><span>-lack of skilled labor
</span><span>-aging pollution</span>
Answer: The map scale
Explanation: A Map Scale is defined as the ratio of the distance on a map to the distance on the surface the map represents. For example, 1 centimetres on a map represents 10 kilometres on the surface of the Earth. What this means is that for every 1 centimetre you measure on the map, that equates to 10 kilometres on Earth/ real life.
Global warming which is not a geological process but something humans have caused
Minnesota, Wisconsin , iowa, Illinois, missouri, kentucky, arkansas, tennessee, lousiana, mississippi
hope this helps :)