Wastewater discharge from hydroelectric power plants" is the correct answer
This was before the time of government oversight, so businesses disposed of hazardous materials in very damaging ways.
Parthenon I believe.... that's what I last remember
The Black Death was a plague that started in Central Asia in 1338 then it reached to China in 1346 One false rumor was that the moguls started it which was not true It affected the Black Sea port by 1347. It killed from 75 to 200 million people. Then Europe was a victim of The Black Death 1346 and lasted until 1353. Cracow and Poland were not affected by the Black Death.
