LESSON NO. 6 Human Population as an Environmental Problem.pptx

LESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Population as an Environmental Problem.pptxLESSON NO. 6 Human Popul

1. Human Population as an Environmental Problem NOVA JOY C. BARRI BSED SCIENCE 2

2. Human overpopulation is among the most pressing environmental issues, silently aggravating the forces behind global warming, environmental pollution, habitat loss, the sixth mass extinction, intensive farming practices and the consumption of finite natural resources, such as fresh water, arable land and fossil fuels, at speeds faster than their rate of regeneration. However, ecological issues are just the beginning...

3. RESULTS OF OVER POPULATION IN OUR PLANET

4. 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.

5. 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.

6. 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.

7. Increased Emergence of New Epidemics and Pandemics Overpopulation exacerbates many social and environmental factors, including overcrowded living conditions, pollution, malnutrition and inadequate or non-existent health care, which wreak havoc on the poor and increase their likelihood of being exposed to infections diseases.

8. Depletion of Natural Resources As the human population continues to explode, finite natural resources, such as fossil fuels, fresh water, arable land, coral reefs and frontier forests, continue to plummet, which is placing competitive stress on the basic life sustaining resources and leading to a diminished quality of life.A study by the UNEP Global Environment Outlook, which involves 1,400 scientists and five years worth of work to prepare, found that "Human consumption had far outstripped available resources. Each person on Earth now requires a third more land to supply his or her needs than the planet can supply."

9. 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. 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. Without these policies, the global ecological crisis, and the societal and economic issues that ensue, would be worse than they are today.

10. 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.

11. 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, has led to the emergence of new parasites and re-emergence of parasites previously considered to be 'under control' by creating the conditions for parasite growth and is responsible for 80% of tropical deforestation.

12. Increased Global Warming and Climate Change "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."

13. 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. As Aisha Tariq of the Pakistan Times states, "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."

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