EnvironmentalProblems & Solutions
Introduction• Maybe you’veheard warningsabout dirty air,water, and soil.Or you’ve heardabout thedestruction of rainforests...
EnvironmentalProblems1. What happenedin the late1700’s thatcaused moreharmfulsubstances toenter the air,water, and soil?In...
Pollution• Pollution: anunwanted change inthe environmentcaused bysubstances or formsof energy• Pollutants: anythingthat c...
Garbage– Includes hazardouswastes, which cancatch fire, explode, ormake people sickChemicals– Some are useful, likemedicin...
High-PoweredWastes– Give off radiationGases– Since IndustrialRevolution, carbondioxide gas hasincreased– Contributes toGre...
Resource Depletion• Renewable resource: one that can beused over and over or has an unlimitedsupply• Examples: wind and so...
• Nonrenewable resource:one than cannot be replacedor that can be replaced onlyover thousands or millions ofyears• Example...
Exotic Species• Exotic species: an organism that makes a homefor itself in a new place outside its native home• Can become...
Habitat Destruction• Habitat: Placewhere an animallives• Biodiversity:number and varietyof organisms in agiven area• Defor...
– Animals can mistakeplastics for food, or becometangled in plasticTime taken for objects todissolve at seaPaper bus ticke...
Environmental Solutions
Conservation: preservation andwise use of natural resources(1)Reduce(2)Reuse(3)Recycle
Protecting Species• Protecting Species• Endangered Species Act:law designed to protectindividual species in orderto mainta...
Environmental Strategies that HelpProtect Earth’s Environment:• Reducepollution• Reduce pesticideuse• Protect habitats• Le...
What You Can Do?• Walk• Ride a bike• Give away oldtoys• Use recycledpaper• Recycle• Volunteer• Use clothnapkins• Visit the...
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Environmental problems

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Environmental problems

  1. 1. EnvironmentalProblems & Solutions
  2. 2. Introduction• Maybe you’veheard warningsabout dirty air,water, and soil.Or you’ve heardabout thedestruction of rainforests. Do thesewarnings mean ourenvironment is in
  3. 3. EnvironmentalProblems1. What happenedin the late1700’s thatcaused moreharmfulsubstances toenter the air,water, and soil?IndustrialRevolution
  4. 4. Pollution• Pollution: anunwanted change inthe environmentcaused bysubstances or formsof energy• Pollutants: anythingthat causes pollution– Can be natural or manmade
  5. 5. Garbage– Includes hazardouswastes, which cancatch fire, explode, ormake people sickChemicals– Some are useful, likemedicines– Others are poisonous,can cause respiratoryproblems, and cancerFive Types of Pollution
  6. 6. High-PoweredWastes– Give off radiationGases– Since IndustrialRevolution, carbondioxide gas hasincreased– Contributes toGreenhouse EffectNoise– Affects ability to hearand think clearly– May damage hearing
  7. 7. Resource Depletion• Renewable resource: one that can beused over and over or has an unlimitedsupply• Examples: wind and solar energy
  8. 8. • Nonrenewable resource:one than cannot be replacedor that can be replaced onlyover thousands or millions ofyears• Examples: most minerals andfossil fuels, such as oil andcoal• Resources become moreexpensive as they becomeharder to find• Removal of materials carries ahigh price tagoil spills, lossof habitat, and damage frommining
  9. 9. Exotic Species• Exotic species: an organism that makes a homefor itself in a new place outside its native home• Can become pests and compete with nativespecies• Example: northern snake-head fish, native to Asia,found in MD pond– Moves across land and caninvade more lakes and ponds
  10. 10. Habitat Destruction• Habitat: Placewhere an animallives• Biodiversity:number and varietyof organisms in agiven area• Deforestation:clearing of forestlands
  11. 11. – Animals can mistakeplastics for food, or becometangled in plasticTime taken for objects todissolve at seaPaper bus ticket 2-4 weeksCotton cloth 1-5 monthsRope 3-14 monthsWoolen cloth 1 yearPainted wood 13 yearsTin can 100 yearsAluminum can 200-500 yearsPlastic bottle 450 yearsFor your info…
  12. 12. Environmental Solutions
  13. 13. Conservation: preservation andwise use of natural resources(1)Reduce(2)Reuse(3)Recycle
  14. 14. Protecting Species• Protecting Species• Endangered Species Act:law designed to protectindividual species in orderto maintain biodiversity• Environmental ProtectionAgency (EPA):government organizationthat helps protect theenvironment– Informs people aboutenvironmental issues– Helps enforce environmentallaws
  15. 15. Environmental Strategies that HelpProtect Earth’s Environment:• Reducepollution• Reduce pesticideuse• Protect habitats• Learn aboutlocal issues• Develop alt.energy sources
  16. 16. What You Can Do?• Walk• Ride a bike• Give away oldtoys• Use recycledpaper• Recycle• Volunteer• Use clothnapkins• Visit the library
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