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.
Human Population Growth: The Effects on Biodiversity. âThe massive growth in the human population through the 20th century has had more impact on biodiversity than any other single factor.â âSir David King, science advisor to the UK government. We all know that the population is expanding.