What are two important ways that humans have helped the overall growth rate?

Give three important reasons why people would move to urban areas? ,
, .

Hope of gaining a better standard of living

Due to the adverse conditions of poverty and unemployment in the rural areas, people migrate to urban areas. In urban areas they find increased employment opportunities and better living conditions.

more and better jobs
better hospitals and health care
better living standards
cities are social and financial centres
better education—schools and universities

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

Nation of conflicting ethnic groups