Other sites let you use the Google Authenticator app to generate the six-digit number. The app generates a different six-digit number for each connected site, and these numbers change every 30 seconds. With the app, you don't have to wait a few seconds to receive a text message.
Factors that cause population growth include increased food production, improved health care services, immigration and high birth rate. These factors have led to overpopulation, which has more negative effects than positive impacts. Keep Learning.
Thus, population growth is directly related to: 1  current population - the number of people today has implications for future population. 2  birth rate - this number is usually reported in number of births per 1,000 people per year and combined with the death rate influences the growth of population. death rate - this number is usually reported in number of deaths per 1,000 people per year and combined with birth rate influences the growth of population.