HUMAN POPULATIONS

1
HUMAN POPULATIONS
2
POPULATION BOOM

• Many environmental problems are due to the rapid
  human population growth
• Between 1850 and 1995 the population has
  increased fourfold- 5.7 billion people

3
KEY TERMS

• Limiting Factors factor that halts growth in a
  population (ex food)
• Carrying Capacity size of population that can be
  supported by the environment

4
DISTRUBTIONS OF ECOSYSTEMS

• Due to - urbanization
• - overfarming--- erosion
• - pesticides
• - pollution (noise, water, air, and land)

5
Conserving Natural Resouces
6
Perpetual Resources

• Resource that never runs out
• a. Solar Energy
• b. Energy from Water

7
Renewable Resources

• Natural events replace these resources
• EX air, water, soil, sunlight, living things

8
Nonrenewable Resources

• Resources that can be taken from the earth only
  once
• EX coal, natural gas, metals, minerals