2. Population growth has placed strains on our environment

3. Nature has a natural way of keeping itself in equilibrium
There are natural cycles that regulate and maintain:
Atmospheric conditions
Soil conditions
Waste removal
Water quality

4. The quality of the atmosphere is regulated by photosynthesis and cellular respiration.
CO2 and O2 levels are kept in balance

5. The quality of the atmosphere is regulated by photosynthesis and cellular respiration.
CO2 and O2 levels are kept in balance
Pollution from burning fuel (gas, oil, and coal) increases the amount of CO2 in the air

6. CO2 and O2 levels are kept in balance
The quality of the atmosphere is regulated by photosynthesis and cellular respiration.
CO2 and O2 levels are kept in balance
Pollution from burning fuel (gas, oil, and coal) increases the amount of CO2 in the air
Cars, factories

7. Waste removal is maintained by decomposers
Decomposers recycle nutrients back into the soil.
The soil is regenerated in cycles to keep it healthy for producers.

8. Waste removal is maintained by decomposers
Decomposers recycle nutrients back into the soil.
The soil is regenerated in cycles to keep it healthy for producers.
Farming of a single crop reduces biodiversity and depletes nutrients in the soil faster than they can be regenerated.

9. Waste removal is maintained by decomposers
Decomposers recycle nutrients back into the soil.
The soil is regenerated in cycles to keep it healthy for producers.
Farming of a single crop reduces biodiversity and depletes nutrients in the soil faster than they can be regenerated.
Humans pollute the land with materials that cannot be decomposed
Plastic, styrofoam

10. Water is purified through the water cycle.
Freshwater is regenerated when it falls from clouds as rain.

11. Water is purified through the water cycle.
Freshwater is regenerated when it falls from clouds as rain.
Human air pollution is mixing in with clouds and affecting the pH level of rainwater.

12. Water is purified through the water cycle.
Freshwater is regenerated when it falls from clouds as rain.
Human pollution is mixing in with clouds and affected the pH level of rainwater.
Acid rain

13. Human population growth is increasing exponentially.
The more humans there are, the more resources we need.

14. Humans are affecting other organisms through our use of land and the pollution we create.

15. Land use decreases the space and resources that are available to other organisms.
Humans have destroyed many habitats and ecosystems.
Humans are decreasing the biodiversity of the natural world.
Humans are affecting global stability

16. Ecosystems form gradually over time
This process is called succession

17. Ecosystems form gradually over time
This process is called succession
Removing stable ecosystems is called deforestation.

21. Pollution changes the chemical composition of air, soil, and water.
Factories and cars release air pollution.
Increasing carbon dioxide levels are destroying the ozone layer of the atmosphere.

24. Air pollution and the destruction of our ozone layer is causing global warming

25. Air, Water, Soil, and Forests are renewable resources.
This means that with time, nature can replenish these resources.

26. Industrialization Increase in technology and manufacturing
Rapidly destroy, use, and produce resources.
Requires a lot of materials
Requires a lot of energy
Gas, oil, coal

27. Fossil Fuels Gas, Oil, and Coal are fossil fuels
They are called “fossil” fuels because they took thousands of years to naturally form
Fossil fuels are finite
Fossil fuels are nonrenewable
Once fossil fuels are used up, they are gone forever

28. The Human Impact Pollution (air, water, soil) Deforestation
Puts carbon dioxide in the air
Global warming
Acid Rain
Deforestation
Reduces biodiversity
Destroys ecosystems
Takes away resources from other organisms
Industrialization
Requires energy and fuel
Fossils fuels are nonrenewable and cause pollution