HUMAN POPULATION GROWTH AND EXPOSURE TO NATURAL HAZARDS Flashcards
IS CONTINUED POPULATION GROWTH DETRIMENTAL TO THE PLANET?
SOME SAY YES → MORE RESOURCE USE, LOWER QUALITY OF LIFE, NATIONS
BECOME WEAKER, …
SOME SAY NO → WE CAN FIND NEW TECHNOLOGIES TO COPE, NATIONS BECOME
STRONGER, ….
measure population and population growth.
FERTILITY RATES
MORTALITY RATES
LIFE EXPECTANCY
+ doubling time.
doubling time
➢The length of time it takes for a population to double
➢Over the last few years the world population is growing at 1.8% per year = will double in 40 years
➢Because some populations are much higher than they should be considering things like carrying capacity.
factors = impact on Human Population.
The 1918 Spanish Flu
COVID-19
black death
= bubonic plague spread from central asia
the industrial and agricultural revolution
green revolution = cereals, seeds = food production
The most important factor when it comes to population growth…
- is whether our planet can deal with it
- is the planet reaching carrying capacity?
Are we going to see further effects of Natural Disasters?
ex: Overpopulation in Africa’s Sahel region
= overgrazing of semi-arid lands and has led to a severe deterioration of the environment.
ENVIRONMENTAL REFUGEES
forced to leave
displaced due to severe environmental
degradation and natural disasters in their home region
CARRYING CAPACITY
how many people the Earth can support.
+ use technology to enhance their environment
(increase agricultural yields for example)
+ not as limited as animal populations would be.
biology: – an ecosystem can only support a limited number of animal populations before it begins to deteriorate
WHO IS MOSTLY AFFECTED?
developing nations don’t have the technology + don’t have the money to protect
themselves from severe climate change
developed nations: coastal
areas will be affected + major storms
//environmental refugees will be rare
since governments have the technology
and funding is available to help
DEMOGRAPHIC TRANSITION
Asia (China and India) = the fastest growing regions
- BEFORE transition = high death rates offset by high birth rates to maintain population
- DURING transition = low death rates coupled with continuing high birth
rates cause population to soar
—- introduction of modern medicine - AFTER transition = low death rates combine with low birth rates to achieve a
stable population at higher level
—-stronger economies + higher levels of education + better healthcare + higher proportion of working women + fertility rate two children per woman.
= most developed countries
+ Ecological footprint increasing as people are concentrated in larger cities among urban centers
first urbanized country
England in the 1850s.
- By the 1950s the rest of Europe could also claim to be urbanized with populations living in areas of over 2000 people.
Urbanization basically goes with industrialization
– i.e. Europe in the 19th and 20th century.
TODAY
= MOST URBAN GROWTH IS NOW IN THE DEVELOPING WORLD
Most urbanized areas?
South America = 70%
Africa = 40%
Asia = 50%
