Mr. AltorferMr. AltorferScienceScience

Environmental ProblemsEnvironmental Problems

Section 21.1Section 21.1

Pages 554 to 559Pages 554 to 559

What You Will Learn What You Will Learn

List the five types of pollutants.List the five types of pollutants. Identify the difference between renewable Identify the difference between renewable

and nonrenewable resources.and nonrenewable resources. Describe the impact of exotic species.Describe the impact of exotic species. Explain why human population growth has Explain why human population growth has

increased.increased. Describe how habitat destruction affects Describe how habitat destruction affects

biodiversity.biodiversity. Give two examples of how pollution affects Give two examples of how pollution affects

humans.humans.

PollutionPollution

Pollution-Pollution- An unwanted change in An unwanted change in the environment caused by the environment caused by substances or forms of energy. substances or forms of energy.

The Five Kinds of PollutionThe Five Kinds of Pollution

1) 1) GarbageGarbage 2) 2) ChemicalsChemicals 3) 3) High-Powered Waste:High-Powered Waste: Radioactive Radioactive

materialsmaterials 4) 4) Gases-Gases- CO CO2 2 (Carbon Dioxide)(Carbon Dioxide) 5) 5) NoiseNoise

GarbageGarbage

LandfillsLandfills

ChemicalsChemicals

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Ozone Layer

High-Powered WastesHigh-Powered Wastes

GasesGases

Greenhouse EffectGreenhouse Effect

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NoiseNoise

Resource DepletionResource Depletion

Resource-Resource- material that living things material that living things use or need in their daily lives.use or need in their daily lives.– Ex. gold, oil, air, water Ex. gold, oil, air, water

ResourcesResources

Renewable Resource-Renewable Resource- A resource that A resource that can be replaced or replenished.can be replaced or replenished.– Example: TreesExample: Trees

Nonrenewable Resource-Nonrenewable Resource- A resource A resource that cannot be replaced or that cannot be replaced or replenished. replenished. – Example: oil & coalExample: oil & coal

Renewable or Nonrenewable?Renewable or Nonrenewable?

Exotic SpeciesExotic Species

Exotic Species-Exotic Species- An organism that An organism that makes a home for itself outside of its makes a home for itself outside of its native home.native home.

Exotic Species cause problems:Exotic Species cause problems:– Become pestsBecome pests– Kill off the native species.Kill off the native species.

Examples: Zebra Mussel, Japanese Stink Bug Examples: Zebra Mussel, Japanese Stink Bug

Exotic SpeciesExotic Species

Human Population GrowthHuman Population Growth

Overpopulation-Overpopulation- The presence of The presence of too many individuals in an area for too many individuals in an area for the available resources.the available resources.

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Habitat DestructionHabitat Destruction

HabitatHabitat-- Where an organism lives. Where an organism lives.– Examples: Lion lives in the jungle,Examples: Lion lives in the jungle,

a swan lives in a lake. a swan lives in a lake.

Habitat DestructionHabitat Destruction

Forest Habitat Destruction-Forest Habitat Destruction- Humans cut down trees to clear the Humans cut down trees to clear the land and use the forest’s resources. land and use the forest’s resources.

What happened

to all these trees?

Habitat DestructionHabitat Destruction

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Habitat DestructionHabitat Destruction

Marine Habitat Destruction-Marine Habitat Destruction- The The polluting the oceans or lakes of the polluting the oceans or lakes of the world. world.

Effects of Pollution on HumansEffects of Pollution on Humans

Pollution and Habitat Destruction Pollution and Habitat Destruction effect people too!effect people too!– Respiratory problems- Do you like to Respiratory problems- Do you like to

breath?breath?– Chemicals cause cancer.Chemicals cause cancer.– Lack of fresh waterLack of fresh water– What other effects do you know about?What other effects do you know about?

Effects of Pollution on HumansEffects of Pollution on Humans