What are some pros and cons of immigration?

Pro-Immigrants boost America's economic growth and raise the general productivity of American workers by providing much-needed skills.

Pro- Immigrant workers allow important sectors of the economy to expand, attracting investment and creating employment opportunities for native-born Americans.

Con-Gender imbalances are caused as it is typically men who seek to find employment elsewhere. Women and children are left behind in certain countries.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.