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Population Canada and the World. Carrying Capacity. There are more than 6 billion human beings on Earth. According to the population estimates released by the United Nations, the 6 billion mark was reached on October 12 1999.
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Carrying Capacity • There are more than 6 billion human beings on Earth. • According to the population estimates released by the United Nations, the 6 billion mark was reached on October 12 1999. • Every second five people are born and two people die, a net gain of three people.
World Population Growth • Our population has grown dramatically in recent decades: • 2,000 years ago there were 300,000,000 people. • In 1800 we reached a population of 1 billion! • By 1900, we had grown to over 1.5 billion! • Today, there are approximately 6.7 billion people on earth!
Population Distribution World Population counts: 1 China 1,298,847,624 2 India 1,065,070,607 3 United States 293,027,571 4 Indonesia 238,452,952 5 Brazil 184,101,109 Questions for Discussion 1. Do you think increased population has a significant impact on the way you live your life? 2. What will the impact of this be on future generations?
This is why studying population is important! • The statistical study of population is known as demography. • Demography helps us to • Understand population changes • plan for things such as schools and hospitals • Make business decisions
Demography: Basic Vocabulary • Census: A way for governments to gather information about the population of a country. • Developed Country: A wealthy country with well developed infrastructure. People living here have a high standard of living. • Developing Country: A poor country with weak infrastructure. People living here have a low standard of living.
Ecological Footprint • Estimates how much productive land and water you need to support what you use and what you discard. • In other words it’s a measure of how much space you take up on the planet.
Calculating Population Change • In order to understand how a population is changing, we must be aware of three things: • How many people are born. • How many people die. • How many people move in or out of an area.
Crude Birth Rate (CBR) • This is calculated by dividing the number of births in one year by the total population and the multiplying the result by 1,000. • The result of this calculation is expressed as the number of babies born in one year for every 1,000 people living in the area. • Canada’s birth rate is approximately 11 per 1,000. • Other countries have birth rates as high as 50 per 1,000!
Crude Death Rate (CDR) • This is calculated by dividing the number of deaths in one year by the total population and the multiplying the result by 1,000. • The result of this calculation is expressed as the number of deaths in one year for every 1,000 people living in the area. • Canada’s death rate is approximately 8 per 1,000. • Other countries have death rates as high as 30 per 1,000!
Rate of Natural Increase • This is calculated by subtracting the death rate from the birth rate. • The result of this calculation is expressed as the % of growth in one year. • Canada’s rate of natural increase is births (11/1,000) minus deaths (8/1,000). • The result (3/1,000) when expressed as a percent, is 0.3% • Our population grows naturally by 0.3% every year.
Doubling Time • This is calculated by using the following formula: • 70 divided by the growth rate = doubling time • Since Canada’s growth rate is 0.3%, the calculation for us would look like this: • 70 divided by 0.3 = 233 • Result: Canada’s population should double in approximately 233 years.
The Effect of Migrations • Population increase in countries like Canada also depends on migration. • Immigration rate: number of people coming into an area in one year for every 1,000 people who already live there. • Emigration Rate: number of people leaving an area in one year for every 1,000 people who already live there. • Net Migration Rate: The difference between the Immigration rate and the emigration rate.
