1. Man’s Relationship with the Environment
Chapter 18A
Living Things as Natural Resources
Man’s Relationship with the Environment

2. Natural Resources
Usable materials that man can obtain from the physical world

3. Natural Resources Some are renewable Some are nonrenewable Trees
Iron ore

4. Natural Resources
Reasons for lack of resources:
Political
Waste

5. Living Things Humans rely on three types of organisms: Producers
Consumers
Decomposers

6. Agriculture
The science of growing crops and livestock

7. Farming
Caring for a concentrated group of plants or animals so that they can be used to supply human needs

8. Agriculture Farming Domesticated organisms Plants Animals
Other organisms
Domesticated organisms

9. Agriculture
Soil
Land grants
Productivity
Depletion of soil nutrients

10. Agriculture Replenishing the soil Fertilizer Certain plants
Legumes
Crop rotation
No-till agriculture

11. Agriculture
Herbicide-resistant varieties of crop plants

12. Man’s Relationship with the Environment
Chapter 18B
Man’s Role in the Ecosystem
Man’s Relationship with the Environment

13. Population Growth Exponential growth
Population increases by a certain percentage every unit
Human population

14. Population Growth

15. Population Growth Different factors In an area: Birthrate Death rate
Zero population growth
In an area:
Immigration
Emigration

16. Population Growth
Limiting factors
Carrying capacity

18. Planning for the Future
Doomsday ecology
Abortion
Euthanasia
“Turning back to nature”

19. Planning for the Future
Christian response
Difficult to predict the future
Earth may still be able to provide food
Showing love to others

20. Conservation
The preservation and wise use of natural resources

21. Planning for the Future
Conservation
Informed decisions
Energy
Fossil fuels
Christians should exercise wise stewardship

22. Man’s Relationship with the Environment
Chapter 18C
Pollution
Man’s Relationship with the Environment

23. Pollution
The addition of impurities to an ecosystem

24. Types of Pollutants Substance Pollutant
Solid, liquid, or gas that pollutes an ecosystem
Biodegradable
Nonbiodegradable

25. Types of Pollutants Energy Pollutant
Any form of energy that pollutes an ecosystem
Heat
Light
Sound
Radiation

26. Pollutants Can affect living organisms in many ways
Direct
Indirect
Most ecosystems can deal with small amounts of biodegradable pollutants

27. Water Pollution Sewage Mostly biodegradable wastes
Sewage treatment facilities
Primary treatment
Secondary treatment
Tertiary treatment

28. Water Pollution Nonbiodegradable chemicals More serious
Can be poisonous to organisms and humans

29. Air Pollution
A combination of liquids, gases, and small particles that collect in the atmosphere

30. Air Pollution Sources Carbon monoxide
Forms when various fuels do not burn completely
Poisonous
Colorless, odorless, tasteless

31. Air Pollution
Sources
Sulfur compounds
Sulfur dioxide
Sulfuric acid

32. Air Pollution Sources Nitric oxide Gas found in auto exhaust
Nitrogen dioxide
Nitric acid

33. Air Pollution
Sources
Smog
Combination of smoke, auto exhaust, and fog

34. Air Pollution Dealing with air pollution Laws Cars and trucks
What can a Christian do?

35. Trash Solid waste materials In the past: Sanitary landfills Dumps
Burn the trash
Dump in oceans
Sanitary landfills

36. Recycling To use again Only some materials are profitable to recycle
Aluminum

37. Our goal is to use resources in a way that glorifies God.
Serving God
Our goal is to use resources in a way that glorifies God.