What was an effect of population migration during the industrial revolution?

the industrial revolution opened many jobs, causing the population to migrate from the countryside to the cities. in this context, the effect was the growth of cities and the agglutination of people. this brought health problems together, since many people lived in precarious conditions of hygiene and at that time there was no basic sanitation.

the industrial revolution changed labor patterns, wealth, material production and population distribution.  the rise in industrial labor opportunities led to a population shift from rural areas to cities.

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the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.