Human Population And Environment by Harshal bhatt

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This ppt contains all the information regarding Environmental Studies and the subject of Human Population And Environment
too.
Here, I have tried to put areas such as
1.Population Growth and Its Variation
2.Causes
3.Effects

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1. Environmental Studies Presented By: ITM UNIVERSE Name Enrollment No: Harshal Bhatt 150950119504

2. Human Population And Environment

3. INTRODUCTION INTRO

4. Population “A Group of organisms of the same species occupying particular space.” The human population is the total number of living humans on Earth. Population is continuously increasing day by day and it is world wide progress if it will happens as it is there will be great problem will create soon. In the next slide there is an table which indicate the situation in 2050. There are top 10 countries in that table and its population in 2050, source by World Population Data Sheet, 2000.

5. Rank Country Population (In Million) 1 India 1,628 2 China 1,369 3 United states (North America) 404 4 Indonesia 312 5 Nigeria 304 6 Pakistan 285 7 Brazil 244 8 Bangladesh 211 9 Ethiopia 188 10 Congo, democratic republic of (Zaire) (Middle Africa ) 182

6. Environment External surrounding and condition which directly or indirectly affects the living organisms”. Environment is usually divided in 2 parts: Biotic Abiotic These biotic and abiotic components are in dynamic state i.e. they contently affect each other and cannot e isolated from each other.

7. Population Growth and Its Variation

8. Causes

9. Our global human population, 6 billion at present. Increase in production per capita of agricultural produce at a global level ceased during the 1980’s. Only 15% of the world’s population in the developed world is earning 79% of income! In some countries, food shortage has become a permanent feature. Two of every three children in South Africa are underweight. In other regions famines due to drought have become more frequent. Present development strategies have not been able to successfully address these problems related to hunger and malnutrition. Change in population over time and can be quantified as the change in number of individuals in a population using per unit time for measurement.

10. Industrial Revolution Which occurred in 19th century Europe and north America, involved several scientific and technological innovations, developments and advancements, have improved the quality of life and have expanded the average life span. Mortality Rate In most third world countries the mortality rate for children is 1 in 10 according to the World Health Organization. Worldwide, there are roughly 9 births for every death.

11. Food Production Since the mid-19th century, many agricultural innovations have enabled farmers to dramatically increase and improve food production. For instance, between 1950 and 1984, the total amount of grain harvested worldwide increased from 631 million tons to 1.65 billion tons. Public health By 1990, technological advancements facilitating cleaner cities, efficient sewage systems, nutritional knowledge and adequate homes have also lowered death rates.

12. Disease Scientific discoveries and technological advancements that help prevent infections, cure illnesses and enable people to survive diseases have significantly promoted population growth. Vaccines have reduced the rate of infections such as smallpox, influenza, rubella and polio. Education Level The level of education a woman reaches may have an influence on the number of children she has. An example of this appears within the 2007 population of Honduras women and the number of children born.

13. Effects

14. Overpopulation It is a condition when an organisms' numbers exceed the carrying capacity of habitat. It is determine using the ratio of a population to available sustainable resources. Impact on Food and Water Food production creates a strain on habitat and energy use. Water is even more critical for human survival. The Sierra Club states that more than 1 billion people do not have access to clean water.

15. Forest Cover More than 16 million hectares are cleared annually. Forest cover is linked not only to biodiversity issues but also to the preservation of freshwater ecosystems, groundwater supplies, and reducing the amount of greenhouse gases, which cause climate change Fossil Fuels Fossil fuels for automobiles requiring all humans to develop alternative forms of transportation Burning coal for electricity, will continue to increase the amount of greenhouse gases in the atmosphere.

16. Soil Erosion Soil Erosion Use pesticides and fertilizer, altering ecosystems in negative ways We are losing soil by building, farming and stripping forests Soil is becoming depleted, and desertification is occurring Pollution The more people there are, the more resources they use, and the more pollution that results. This pollution may include air pollution due to increased fossil fuel emissions from vehicles, or land or water pollution due to increased amounts of waste.

17. Public Health Concerns Unchecked population growth may lead to public health problems For example, in many developing countries, populations do not have access to clean water sources. Water pollution, caused by a lack of proper sanitation, can easily lead to the spread of disease. Human Population and Global Warming Logic leads one to believe that more people means more waste and greater effects on global warming. Many believe that it's a naturally occurring phenomenon with no bearing on human activity or population growth

18. Population explosion It is the very great and continuing increase in human population in modern times It can lead to depletion of resources Severe competition for food and space Increase in psychological stress and strain Rapid pollution of environment Large scale unemployment forests are cut, oceans are exploited and the entire natural equilibrium gets disturbed A growth human population first faces the problem of food, shelter and socio-economic problems

19. The End

20. Thank you for your time....