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.
Other negative effects of population growth and, specifically, overpopulation include poverty caused by low income per capita, famine, and disease. India is a prime example of Thomas Malthusâ theory of population growth and its effect on the economy.