How have patterns of birthrates and death rates for the human population changed over the past two centuries, and how have these changes influenced patterns of population growth?
Over the past two centuries, birthrates and death rates for the human population have changed dramatically. In the early 19th century, birthrates were high and death rates were also high due to a lack of medical knowledge and access to healthcare. As medical knowledge and access to healthcare improved, death rates decreased significantly, while birthrates remained relatively high. This resulted in a rapid increase in population growth, which has continued to the present day. The combination of high birthrates and low death rates has led to a population explosion in many parts of the world, with some countries experiencing population growth rates of over 2% per year. This rapid population growth has had a significant impact on the environment, resources, and economies of many countries.
