Amajor cause of pollution in medieval cities was

Unclean way of life

Explanation:

People in the Middle Ages didn't care much about hygiene. The streets were filthy, you could see different animals wandering on the streets, and the rats were spreading diseases across the cities.

This is why in the Middle Ages more people died out of sickness than out of some other cause.

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b

what are two things that greatly the american economy after the war? the huge buildup of u.s. military the beginning of the korean conflict the creation of the gi bill the marshall plan for nations