1. Human Impact

2. Human Population

3. Pollution Harmful materials entering the environment
Point source pollution – from a clearly identifiable source
Nonpoint pollution comes from many different sources.
Four main categories – industrial, residential, commercial, and environmental

4. PART 2 – PROBLEMS
Problems resulting from human impacts on the quality of our environment
A. Aquatic Environment Issues –Water pollution, Ocean Dead Zones, Water Diversion, Overfishing (2015)
B. Air Quality Issues – Acid rain, Air Pollution, Nuclear Pollution (2015)
C. Climate Change Issues – Greenhouse Effect, Ozone Depletion (2015)
D. Terrestrial Environment Issues – Desertification, Deforestation, Soil pollution, Waste Disposal, Mining (2016)
E. Population Growth Issues – Habitat Destruction, Farming Practices, Fertilizers & Pesticides (2016)

5. Sources of pollution
organic pollution – decomposition of living organisms and their bi-products
inorganic pollution – dissolved and suspended solids as silt, salts, and minerals
toxic pollution – heavy medals and other chemical compounds that are lethal to organisms
thermal pollution – waste heat from industrial and power generation processes
radiation pollution - radioactive materials

6. Environmental Pollution
Air Pollution
Water Pollution
Soil Pollution
Noise Pollution
Radioactive Pollution
Thermal Pollution
Light Pollution

7. Aquatic Environmental Issues (2015)
Water pollution
Eutrophication
Ocean Dead Zones
Thermal Pollution
Water Diversion
Overfishing

8. Water Pollution

10. Eutrophication
Eutrophication – bodies of water becomes enriched with nutrients. This can be a problem in marine habitats such as lakes as it can cause algal blooms.
run-off from fertilizers, into nearby water causing an increase in nutrient levels.
It causes phytoplankton to grow and reproduce more rapidly, resulting in algal blooms.
This bloom of algae disrupts normal ecosystem functioning and causes many problems.
The algae may use up all the oxygen in the water, leaving none for other marine life. This results in the death of many aquatic organisms such as fish, which need the oxygen in the water to live.
The bloom of algae may also block sunlight from photosynthetic marine plants under the water surface.
Some algae even produce toxins that are harmful to higher forms of life. This can cause problems along the food chain and affect any animal that feeds on them.

11. Ocean Dead Zones
Eutrophication is magnified as rivers lead into larger rivers and eventually into the ocean – as the Mississippi River network. This leads to ocean dead zones.

12. Spills or Dumping in Oceans
Chemical spills and dumping of waste in the oceans or near coral reefs and ocean shelf areas causes major environmental problems.
BP Oil Rig Explosion 2010

13. Thermal Pollution & Rising Ocean Temperatures
Change in the water temperatures of lakes, rivers, and oceans caused by made-man industries or practices
Water as coolant is warmed returned & to body of water
Ocean warming from climate changes
Coral Bleaching

14. Water Diversion Dams are a major factor in
water diversion. Dams are built along rivers to produce reservoirs.
This affects the ecology of the river and the surrounding environment including Habitat Loss, Habitat Fragmentation, and Loss of Biodiversity
The Colorado River is a good example.

15. Overfishing
Fish catch has risen from 20 million tons/year to over 90 million tons / year
World Fish Catch

16. Air Quality Issues – 2015
Acid rain
Air Pollution
Nuclear Pollution

17. Acid Rain

18. Air Pollution

19. Fukushima Daiichi Disaster -2011
Nuclear Pollution
Nuclear pollution is pollution that is radioactive. 
Fallout can lead to radiation sickness and death.
Nuclear fallout can destroy environmental features and animal life.
Fukushima Daiichi Disaster -2011

20. Climate Change Issues
Greenhouse Effect - warming that results when the atmosphere traps heat radiating from Earth toward space.
Ozone Depletion - ozone layer is deteriorating due to the release of pollution containing the chemicals chlorine and bromine (chlorofluorocarbons or CFCs)

21. Greenhouse Effect

22. Ozone Depletion

23. Ozone Hole over Antartica
Source: NASA

24. Desertification Deforestation Soil pollution Waste Disposal Mining
Terrestrial Issues- 2016
Desertification
Deforestation
Soil pollution
Waste Disposal
Mining

25. Desertification
Desertification is an expansion of arid conditions into a non-arid environment.
Major causes of desertification include
Overgrazing & poor grazing management
Cultivation of marginal lands
Destruction of vegetation in arid regions
Incorrect irrigation practices leading to salinization

27. Deforestation
Deforestation – the permanent destruction of indigenous forests and woodlands.
Causes include
Conversion of forests to agricultural land to feed
people
Development of cash crops and cattle raising esp. in
tropical countries
Commercial logging that is not regulated
Poor soils in humid tropics do not support agriculture
for long so more clearing becomes necessary

28. Soil Pollution
Ways that soil can become polluted, such as: • Seepage from a landfill • Discharge of industrial waste into the soil • Percolation of contaminated water into the soil • Rupture of underground storage tanks • Excess application of pesticides, herbicides or fertilizer • Solid waste seepage Most common chemicals involved in causing soil pollution are: • Petroleum hydrocarbons • Heavy metals • Pesticides • Solvents

29. Waste Disposal
Waste, or rubbish, trash, junk, garbage is an unwanted or undesired material or substance.
 It may consist of the unwanted materials left over from a manufacturing process (industrial, commercial, mining or agricultural operations,) or from community and household activities.
The material may be discarded or accumulated, stored, or treated (physically, chemically, or biologically), prior to being discarded or recycled.

30. Mining - Environmental Risks

31. Population Growth Issues –2016
Urbanization
Habitat Destruction
Farming Practices
Fertilizers & Pesticides

32. Human Population Growth

33. Urbanization Concerns: Public Health Food Supply Freshwater
Coastlands and Oceans
Forests
Biodiversity and Habitat Destruction
Global Climate Change

34. Habitat Fragmentation & Destruction
Habitat destruction and fragmentation is a process
that describes the emergences of discontinuities
(fragmentation) or the loss (destruction) of the
environment inhabited by an organism.
It results in
Loss of resident species
Loss of food sources
Loss of ecosystem functions provided by the habitat

35. Biodiversity Threats Habitat loss & Fragmentation Invasive species
Pollution
Climate Change
Over exploitation
Human Populations

36. Farming Practices Negative environmental impacts from
unsustainable farming practices include: Land conversion & habitat loss
Wasteful water consumption
Soil erosion and degradation
Pollution
Climate change
Genetic erosion

37. Fertilizers and Pesticides

38. Part 3 – Solutions
A. Environmental Remediation Strategies B. Sustainability Strategies C. Nonrenewable vs. Renewable Energy Sources and Alternate Energy Sources D. Everyday Solutions as recycling and composting E. Legislation and Economic Opportunity for Solving Problems

39. Tragedy of the Commons
Conflict between individual interest and the common good
When individuals use a public good, they do not bear the entire cost of their actions
Who takes responsibility for protecting the environment?

40. Environmental Remediation Strategies
Environmental remediation is the removal of pollution or contaminants from the environment
Strategies and techniques include (coordinated by EPA)
Site assessment and mapping
Excavation and dredging
Pump and treat
Solidification and stabilization
Oxidation
Soil vapor extraction
Bioremediation – using microbes to remove pollutants

41. Sustainability Strategies
Sustainability - biological systems enduring and remaining diverse and productive Strategies include Minimize energy consumption & using alternate energy Minimize water consumption Minimize negative environmental impacts Minimize waste generation and recycling Develop eco-friendly products and processes

42. Strategies for a Sustainable World
advancing technologies to reduce waste
increasing recycling and reuse
creating even safer treatment and disposal options
developing sources of renewable energy
sharing the benefits of our learning and innovation

43. Nonrenewable vs. Renewable Energy Sources
Non-renewable energy sources – fossil fuels as coal, oil and natural gas as well as nuclear fuels – limited supply will run out and have negative environmental impacts
Renewable energy sources – sun, wind, waves, heat, hydropower and biomass that can be used again and again and is cleanest energy sources.
There are pros and cons for each type of energy

44. Alternate Energy Sources
Alternate to Fossil Fuels – produced and recovered without negative effects on the environment as
Solar
Wind power
Geothermal
Tides and waves
Biomass
Fuel cells

45. Everyday Solutions
Conserve
Increase Efficiency
Recycle

46. Composting Benefits of Composting Soil Conditioner – create rich humus
Recycles kitchen and yard waste
Introduces beneficial organisms in the soil
Good for the environment as a natural alternative to chemical fertilizers
Reduces landfill waste

47. Economic Opportunity Support careers in Environmental Remediation
Development of Environmentally Safe Products and Processes which are economically sound.
Encourage Economic Growth that is environmentally beneficial