Answer:
Population decline
Step-by-step explanation:
Industrialization was a major step towards the growth in the European countries. The countries witnessed an increase in the population growth. The commercialization expanded with an increase in the market expansion. There was an increase in the technological advancement and increase in the production of finished goods. With growth in the market, the world went across the problem of air and water pollution. The population increased at an alarming rate and with the increase the cities became overcrowded. Diseases and their spread became very infectious.