Push factors include war, famine, descrimination ect. in the native country of the migrant eg Irish people were pushed to emigrate to america and england during the Great Hunger (1845-1849)
pull factors include the promise of good job opportunities in america, hot climate, ect
Answer:
Noise pollution and health problems. The internal combustion engine is behind virtually every form of high-speed travel that we have today, from early planes to cars to trains.
Explanation:
The green revolution because it refers to a set of research and development.
