For Grade 12, Elem/HS Department, The University of Manila. This Power point presentation is about Population explosion and its effects in the world especially in the Philippines.

1. LESSON 2:
POPULATION EXPLOSION

2. POPULATION
Sit Dolor Amet

3. It is defined as a group of individuals of the same species living
and interbreeding within a given area. Members of a population
often rely on the same resources, are subject to similar
environmental constraints, and depend on the availability of other
members to persist over time. Scientists study a population by
examining how individuals in that population interact with each
other and how the population as a whole interacts with its
environment.

5. POPULATION EXPLOSION

6. It refers to the rapid increase in the
population of an area among human
beings. Furthermore, it is a situation
where the economy is not capable of
coping with the increasing demand of
its population.

8. OVERPOPULATION

9. It refers to a population which exceeds its sustainable size within a particular
environment or habitat. Overpopulation results from an increased birth rate,
decreased death rate, the immigration to a new ecological niche with fewer
predators, or the sudden decline in available resources. Therefore,
overpopulation describes a situation in which a population in a given
ecosystem limit the resources available for survival.

11. EFFECTS OF
OVERPOPULATION
Sit Dolor Amet

12. 1. LOSS OF FRESH WATER
According to UN-Water, 75% of planet Earth is covered in water. 97.5% of that
is ocean and 2.5% is freshwater. 70% of freshwater is divided into glaciers and
ice caps and the remaining 30% into land surface water, such as rivers, lakes,
ponds and groundwater. Most of the freshwater resources are either unreachable
or too polluted, leaving less than 1% of the world's freshwater, or about 0.003%
of all water on Earth, readily accessible for direct human use.

14. 2.SPECIES EXTINCTION
Human beings are currently causing the greatest mass extinction of species since
the extinction of the dinosaurs 65 million years ago at rates 1000 to 10,000 times
faster than normal. The 2012 update of the IUCN Red List of Threatened Species
shows that of the 63,837 species examined worldwide, 19,817 are threatened with
extinction - nearly a third of the total.

16. 3.LOWER LIFE EXPECTANCY IN THE
FASTEST GROWING COUNTRIES
According to a Harvard study, "Over the next forty years, nearly all (97%) of the 2.3 billion
projected increase will be in the less developed regions, with nearly half (49%) in Africa."
Already strained with relentless population explosion, many developing countries, such as in
Sub Saharan Africa and Southern Asia, will experience a degradation of their quality and
length of life as they face increasing difficulties to supply water, food, energy and housing to
their growing populations, which will have major repercussions for public health, security
measures and economic growth.

18. 4. LESS FREEDOM, MORE RESTRICTIONS
• As population densities increase, laws, which serve as a primary social mediator of
relations between people, will more frequently regulate interactions between humans and
develop a need for more rules and restrictions to regulate these interactions. Aldous
Huxley predicted in 1958 that democracy is threatened due to overpopulation and could
give rise to totalitarian style governments and it turns out he was right. Rules and
restrictions can be good ideas, but only because they are necessary in order to
accommodate the growing populations that are encouraging such policies.

21. 5.MORE INTENSIVE FARMING PRACTICES
Intensive farming practices produce more and cheaper food
per acre and animal, which has helped feed a booming human
population and may prevent surrounding land from being
converted into agricultural land, but has grown to become the
biggest threat to the global environment through the loss of
ecosystem services and global warming.

24. 6.INCREASED HABITAT LOSS
Human overpopulation is a major driving force behind the loss of
ecosystems, such as rainforests, coral reefs, wetlands and Arctic ice.
Rainforests once covered 14% of the Earth's land surface, now they cover
a bare 6% and experts estimate that the last remaining rainforests could
be consumed in less than 40 years and certainly by the end of the
century at the current rate of deforestation.

27. 7. INCREASED GLOBAL WARMING AND
CLIMATE CHANGE
According to the Center for Biological Diversity, "The
largest single threat to the ecology and biodiversity of the
planet in the decades to come will be global climate
disruption due to the buildup of human-generated
greenhouse gases in the atmosphere.

31. 8. ELEVATED CRIME RATE
As human overpopulation drives resources and basic necessities,
such as food and water, to become scarcer, there will be increased
competitiveness for these resources which leads to elevated crime
rates due to drug cartels and theft by people in order to survive.

33. OVERPOPULATION IN
PHILIPPINES

34. THE PHILIPPINES HAS ONE OF THE FASTEST GROWING POPULATION
IN ASIA. FROM HAVING FIFTY MILLION INHABITANTS IN 1980, THE
PHILIPPINES TODAY IS HOME TO AROUND NINETY MILLION PEOPLE
WITH 11 MILLION LIVING IN MANILA. LIVING PLACE IS BECOMING
SATURATE

35. THIS OVERCROWDING IS CAUSING A RANGE OF PROBLEMS SUCH AS
LACK OF EDUCATION, LACK OF HEALTHCARE, UNEMPLOYMENT
AND GENERAL PROPERTY. IT IS BELIEVED THAT IN THIRTY YEARS
TIME WHEN THE PHILIPPINE POPULATION IS EXPECTED TO HAVE
DOUBLED TO OVER 180 MILLION.

36. WITH EVERY PASSING SECOND, THERE ARE MORE AND MORE OF US.
BY THE YEAR 2050, THE GLOBAL POPULATION IS EXPECTED TO PASS
NINE BILLION PEOPLE, A SIGNIFICANT INCREASE FROM SIX AND A
HALF BILLION. IN THE PHILIPPINES, THEY ARE ALREADY RUNNING
OUT OF SPACE. THE CAPITAL CITY OF MANILA IS ONE OF THE
LARGEST AND DENSELY POPULATED CITIES OF THE WORLD.