1. Human Impact on the Environment Our actions today do impact the future!

2. How does human pop’n growth affect the environment? 1.Our population is rising b/c we can alter our environment 2.Improved health care, hygiene, and large food supply 3.Humans have a carrying capacity just like other organisms 4.We are using more resources, producing more waste, taking up more space 5.WE NEED TO FIND A WAY TO CONTROL POPULATION GROWTH!

3. What are the natural processes that occur on our planet? 1.Process #1: MAINTAINING AIR QUALITY Biotic: RECYCLING of O 2 and CO 2 by plants and animals Abiotic: Rain cleans air 2.Process #2: SOIL FORMATION Soil forms from EROSION and decaying organisms Roots of plants help keep down soil so it doesn’t blow away

4. What are the natural processes that occur on our planet? 3.Process #3: THE W WW WATER CYCLE Evaporation  Clouds  Rain Fresh water supply is maintained

5. Thursday, June 12, 9:34:04 AM Click on the water cycle below to see it animated 3.Process #3: THE WATER CYCLE Evaporation  Clouds  Rain  Fresh water supply is maintained

6. What are the natural processes that occur on our planet? 4.Process #4: WASTE REMOVAL AND RECYCLING OF NUTRIENTS DECOMPOSERS put nutrients back in soil So minerals are RECYCLED through food chains

7. 5.Process #5: FLOW OF ENERGY Energy is passed through environment but NOT RECYCLED Always need a constant source of energy (THE SUN!!) What are the natural processes that occur on our planet?

8. Thursday, June 12, 9:34:04 AM machines 1. Industrialization is the development of an economy in which machines produce many of the products people use. WHAT IS THE IMPACT OF TECHNOLOGY ON NATURAL PROCESSES

9. Pollution of air and water Increased demand for energy, water, and fossil fuels EX: Nuclear Power Plants Cause thermal pollution of waterways Disposal of radioactive wastes big problem Solution: Practice the 3 R’s Use alternative sources of energy Reuse and recycle materials already made Industrialization:

10. What is the impact of technology on natural processes? 2.WATER POLLUTION: Brain pop video (3:16 min) Brain pop video Depletion of O 2 in water: Cause: by dumping of sewage and animal parts Result: Can act as fertilizer for some bacteria and algae and they will consume all available O 2

11. TOXIC WASTES: Cause: Fertilizers and pesticides used get into water supply Result: Organisms are poisoned Organisms higher on the food chain absorb more toxins (ex. mercury and DDT) since they eat more Bioaccumulation What is the impact of technology on natural processes?

12. Bioaccumulation

13. What is the impact of technology on natural processes? Thermal pollution: Cause: Warmed water from power plants dumped back into lakes and rivers Result: Less dissolved O 2 in warmer water causing organisms to suffocate Solutions for Water Pollution: 1.Use alternative pest control instead of pesticides Sterility treatments, hormone controls Add a natural predator 2.Stop dumping things into water that shouldn’t be there!

14. 3. AIR POLLUTION Cause #1: Burning wastes Result: waste materials end up in water cycle anyway and make acid rain Cause #2: Burning Fossil Fuels – Brain Pop Video (3:33)Brain Pop Video Result: adds too much CO2, sulfur and other harmful gases into air and make acid rain Acid Rain causes much damage to organisms that cannot survive in low pH Solutions for Air pollution: Set limits for how much a factory can burn

15. How do pollutants affect the atmosphere? 1.GLOBAL WARMING CAUSE:CAUSE: “Greenhouse Gases” trap sun’s heat to keep our planet warm“Greenhouse Gases” trap sun’s heat to keep our planet warm EX: CARBON DIOXIDE ( CO 2 )EX: CARBON DIOXIDE ( CO 2 ) Greenhouse Gases have increased since early 1900’s b/c of industrializationGreenhouse Gases have increased since early 1900’s b/c of industrialization BURING FOSSIL FUELS PUTS EXCESS CO 2 INTO THE ATMOSPHEREBURING FOSSIL FUELS PUTS EXCESS CO 2 INTO THE ATMOSPHERE As a result avg. Earth temp is increasingAs a result avg. Earth temp is increasing

17. A. POSSIBLE EFFECTS OF GLOBAL WARMING: Change in climate patterns Melting of ice caps could cause flooding Flooding of coastal regionsFlooding of coastal regions Increase in the rate of species lossIncrease in the rate of species loss B. SOLUTIONS TO STOP GLOBALWARMNG: PLANT TREES b/c they use CO2 (act as carbon tanks) STOP cutting down trees Find alternative fuel sources that do not release CO2 into air

18. How do pollutants affect the atmosphere? 2.OZONE LAYER DEPLETION Brain Pop Video (2:58) Brain Pop Video Brain Pop Video OZONE LAYER PROTECTS US FROM HARMFUL RADIATION FROM SUNOZONE LAYER PROTECTS US FROM HARMFUL RADIATION FROM SUN A.CAUSES OF DEPLETION: Release of CFC’s into atmosphereRelease of CFC’s into atmosphere Come from refrigerators, air conditioners, and aerosol cansCome from refrigerators, air conditioners, and aerosol cans B.EFFECTS OF OZONE DEPLETION: Excess radiation can causes:Excess radiation can causes: Genetic mutationsGenetic mutations More skin cancerMore skin cancer Destroy producers in oceansDestroy producers in oceans CFC’S no longer used in those thingsCFC’S no longer used in those things Ozone Depletion protects from UV rays

19. Effects of loss of Ozone Wrinkles & SKIN CANCER

20. Actions being taken by humans to reduce or repair damage to the environment include: 1.Recycling wastes 2.Conserving available resources nonrenewable; any resource, such as fossil fuels and minerals, that cannot be replaced and renewable; resources, such as our food supply and solar energy, which, given time, can be replaced 3.Using cleaner resources (ex: solar over fossil fuels) 4.Protection of habitats and endangered species 5.Use of biological controls instead of pesticides and herbicides 6.Farming native plants (ex: cocoa in the rainforest) 7.Planting trees to replace those cut down. 8.Rotating crops or planting cover crops to reduce soil loss.

21. What Can You Do?  Keep pets indoors  Choose tap over bottled water  Adjust two degrees -To help out locally and globally you can also volunteer or donate to the American Museum of Natural History’s Center for Biodiversity and Conservation Humans now rely upon just 14 species of mammals and birds to supply 90% of all animal-derived foods Reliance upon modern varieties of rice has caused more than 1,500 local rice varieties in Indonesia to become extinct  Choose green energy