Human overpopulation (0)

Human overpopulation
Liis Lukk
MJ15
What is overpopulation?
• Overpopulation is an undesirable  condition  where the 
number of existing human population exceeds the 
carrying  capacity  of Earth. 
• Human overpopulation is  among  the most pressing 
environmental  issues
• Overpopulation can  result  from an  increase  in births, a decline 
in  mortality  rates, an increase in  immigration , or an 
unsustainable  biome  and depletion of resources
• Human population has been rising continuously  since  the end of 
the  Black   Death ,  around  the  year  1350
• The most significant increase has been since the 1950s, mainly 
due to  medical  advancements and  increases  in agricultural 
productivity
• The  recent  rapid increase in human population over the past 
three  centuries  has raised  concerns  that the  planet  may not be 
able  to sustain  present  or future  numbers  of inhabitants. 
Loss of Fresh  Water
• 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. 
• According to the  Global  Outlook for Water Resources to the Year 2025, 
it is  estimated that by 2025, more than half  of the world population 
will be facing water- based vulnerability  and human demand for water 
will account for 70% of all  available  freshwater.
• Freshwater is the most fundamental  finite  resource  with no 
substitutes for most uses, yet we are consuming fresh water at least  
10  times faster than it is being replenished in regions of northern  
Africa , the  Middle  East, India, Pakistan , China , and the U.S.. 
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 .
• If present  trends continue , scientists warn that  within  a few 
decades, at least half of all  plant  and  animal  species on 
Earth will be  extinct , as a result of climate  change ,  habitat  
loss, pollution, acidifying oceans, invasive species, over-
exploitation of natural resources, overfishing, poaching and 
human overpopulation.
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 .
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.
• People around the world are  beginning  to address the 
problem by reducing their carbon footprint  through  less 
consumption  and better technology.
• But unsustainable human population growth can 
overwhelm those efforts, leading us to conclude that we 
not only need smaller footprints, but fewer feet.
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 .
• It has been observed that the countries which have 
balanced population, crime rate is very low in such 
regions. When people are not  provided  with the basic 
necessities, it elevates crime rate."
How can we help?
•  Birth  regulations
•  http://www.everythingconnects.org/overpopulation-effec
ts.html
•  https://www.conserve-energy-future.com/causes-effects -
solutions -of-overpopulation.php
•  https://en.wikipedia.org/wiki/Human_overpopulation

Document Outline

• Slide 1
• What is overpopulation?
• Slide 3
• Loss of Fresh Water
• Species Extinction
• Lower Life Expectancy in the Fastest Growing Countries
• Increased Global Warming and Climate Change
• Elevated Crime Rate
• How can we help?
• Slide 10