Question

3). Describe human population growth that has occurred in the past 400 years. Use terms learned in the course to explain the different stages of growth of any population and relate that to the human population. Be sure to include K, r, and compare growth in developing and developed countries in the world.

Answer 1

Ans( 3 ). HUMAN POPULATION GROWTH

The exponential growth of human population could lead to food shortages, global warming, and other issues of resource scarcity.

Global human population growth is around 75 million annually, or 1.1 % per year.

In the late 1970s China's one child policy tried to control population growth, but restrictions were relaxed in the early 2000s .

KEY TERMS :- 1) green house gas- cause continued warming when green house gas like co2 released into atmosphere.

2) Climate change - produced by global warming .

The world human population increased from 1 billion in 1800 to 7.7 billion today. The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year.

STAGES IN HUMAN POPULATION GROWTH

1) high stationary phase - marked by high birth rates and high death rates.

2)Early expanding phase - characterised by high birth rates of the high stationsy level and by lower , often falling , death rates.

3)Late expanding phase - marked by declining birth rates and death rates, wherein the death rates are consistently lower than the birth rates, thus yielding annual increase in population .

4)low stationary phase - marked by low birth and death rates.

5) Declining phase - marked by actual excess acess of deaths over births and unless compensated by immigration , by a fall in numbers.