Summarize the story of how human population growth has surpassed 7.3 billion and explain why this is significant to many environmental scientists (Core Case Study). List three factors that account for...

Summarize the story of how human population growth has surpassed 7.3 billion and explain why this is significant to many environmental scientists (Core Case Study). List three factors that account for the rapid growth of the human population over the past 200 years.