Chapter 4

Pollution

-an unwanted change in the environment caused by substances or forms of energy

Pollutant

– anything that causes pollution

Garbage,

Chemicals

High-powered wastes

Gases

Noise

– kinds of pollution

 

Renewable Resource

– a natural resource that

  can be replaced at the same

  rate at which it is being used.

 

Nonrenewable Resource

– a resource that

  cannot be replaced

– one that takes thousand

  or millions of years to form.

 

 

Exotic Species

– an organism that makes

  a new home for itself

  outside of its native home

 

 

 

Overpopulation

-too many individuals in

 an area for the available

 resources

 

 

 

Human Population Growth

– is due to advances in

   medicine and farming

   techniques

 

 

 

Biodiversity

– the number and variety

  of species in a given area

  over a period of time

 

 

 

Deforestation

– the cutting, burning, &

  destruction of forest lands

 

 

Point-source pollution

– pollution that comes from

  one source (like an oil spill)

 

 

Nonpoint-source pollution

– pollution that comes from

  many different sources

  (EX. chemicals on land washed

   into lakes, rivers, streams)

 

 

 

 

Conservation

– the preservation and wise

  use of natural resources

– can help prevent habitat destruction

– helps reduce waste and pollution

 

 

 

Reduce

– the best way to conserve Earth’s;

; natural resources

– use less amount of resources

;

;

;

Biodegradable

– anything that can be broken

; down by living organisms such

; as bacteria

;

;

Reuse

– to use a product again

; instead of throwing it away

– reclaim water by cleaning it

; and returning it to underground

; water supplies

;

;

;

;

Recycle

– the process of recovering

;;valuable or useful materials

; from waste or scrap

;

;

;

Resource Recovery

– reusing resources to make

; something else

(using garbage to make electricity)

;

;

CFCs

;

– chemicals that can destroy

; the ozone;layer

– chemicals that have been banned!

;

;

Fossil Fuels

– are nonrenewable resources

;;such as;coal and oil

– used for electricity

; and transportation

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