G8 Science Q4- Week 7 Human-Impact-on-Environment.pptx

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1. HUMAN IMPACT ON ENVIRO NMENT

2. Suggest ways to minimize human impact on the environment S8LT-IVj25

3. WHAT DOES HUMAN IMPACT MEAN???

4. AND HUMAN IMPACT ON ENVIRONMENT MEANS The adverse effects caused by d evelopment, i ndustrial, or by the release of a substances is the environment or by any other human activity…

5. HUMAN IMPACT ON EN VIRONMENT FACT ORS: Factors contributing to ENVIRONMENTAL LOSS are:  DEFORESTATION,  OVER-POPULATION,  WASTE,  POLLUTION,  OVERUSE/WASTAGE OF NATURAL RESOURCES,  ENERGY INDUSTRY etc....

6. DEFORES TATION Deforestation is the removal of a forest where the land is thereafter converted to a non-forest use . Deforestation occurs for many reaso ns:  used or sold as fuel,  used as pasture for livestock,  plantations of commodities,  Settlements etc..

7. EFFECT OF DEFORESTATION The loss of trees and other vegetation can cause  climate change, desertification, soil erosion, fewer crops, flooding, increased greenhouse gases in the atmosphere, and a host of problems for Indigenous people .

8. Effects of deforestation Concentration of nitrate (mg/l ) 1965 1966 Year 2 4 40 80 1967 1968 Deforestation nitrate levels in runoff 40% increase in runoff loss of water 60x loss in nitrogen 10x loss in calcium loss into surface water loss out of ecosystem ! Why is nitrogen so important?

9. OVER-POPU LATION Human overpopulation occurs if the number of people in a group exceeds the carrying capacity of a region occupied by that group.

10. IMPACT OF OVER- POPU LATION

11. THE EFFECTS OF OVERPOPULATION

12. An increase in population will inevitably create pressures leading to more deforestation, decreased biodiversity, and spikes in pollution and emissions, which will exacerbate climate change ECOLOGICAL DEGRADATION

13. The scarcity brought about by environmental disruption and overpopulation has the potential to trigger an increase in violence and political unrest. INCREASED CONFLICTS

14. Many of the recent novel pathogens that have devastated humans around the world, including COVID-19, Zika virus, Ebola, and West Nile virus, originated in animals or insects before passing to humans. Part of the reason the world is entering “ a period of increased outbreak activity ” is because humans are destroying wildlife habitats and coming into contact with wild animals on a more regular basis. HIGHER RISK OF DISASTERS AND PANDEMICS

15. WAS TE Waste and wastes are terms for unwanted materials. Examples include  municipal solid waste (household trash/refuse),  hazardous waste,  wastewater (such as sewage, which contains bodily wastes,or surface runof f),  radioactive waste, and others.

16. Domestic waste Agricultural waste Industrial waste

17. POLLU TION  Pollution- adding harmful substances or products into the en vironment  The use of fossil fuels is the major cause of pollution Air Land Water Sm og O zone Depl etion Acid Rain Solid wastes La ndfills Oil spills fert ilizers

18. Air Pollution

19. Water Pollution

20. Land Pollution

21. ENERGY INDUSTRY The environmental impact of energy harvesting and consumption is diverse.  Biodiesel  Coal mining and burning  Electricity generation  Nuclear power  Oil shale industry  Petroleum  Reservoirs  Wind power

22. OVERUSE OF NATURAL RESOURC ES  the depletion of natural resources has become a major focus of governments and organizations such as the United Nation s. The depletion is caused by  Mining,  petroleum extraction,  Fishing,  Forestry etc..

23. HOW YOU CAN HELP OUR ENVIRONMENT?

24. MAKE A SLOGAN ON HUMAN IMPACT ON ENVIRONMENT