1. Environmental Issues
Human Impact on Earth

2. Objectives Describe major consequences of air pollution
Relate air pollution to effects on global climate
Describe how chemical pollutants may undergo the process of biological magnification
Identify the primary causes of modern extinctions
Explain why extinctions and ecosystem disruption are of concern to humans
Relate human resource use to its impacts on ecosystems

3. Vocabulary Pollution Smog Chlorofluorocarbons (CFC)
Biological Magnification
Acid Precipitation
Extinction
Keystone Species
Sustainability

4. Pollution
Putting _____________________ unintended harm into air, water, or soil.
Has the potential to __________________________.
What are some examples of pollution?

5. Effects Smog Water _________+ Chemicals
Generated from factories, burning fuels, and home.
___________ Oxides (NOx)
___________ Oxides (SOx)
Ozone (O3)

6. Ozone Thinning
Ozone, in its layer 20km above the Earth (_________________), is _______________________
Ozone lower in the ________________ is harmful
________________ chemicals destroy the ozone layer

7. CFCs
_______________________ were widely used _______________ until scientists discovered their harmful effects
Used in _____________, air conditioners, and ___________
They act as a catalyst leading to the _______________________________________

8. Global Warming
Correlation between _________________ and average global _______________________.
Correlations are difficult to_____________, however.
Changes in global temperatures ______________________, soil moisture, and sea levels around the world.
The ______________ of ____________________________ ecosystems are also dangerous possibilities.

9. Air, Land and Water
Acid precipitation- _________________ combine with water in the atmosphere and form acids.
________________________ and waste can severely damage ecosystems.
Biological ______________- when harmful chemicals placed into nature _________________________ within the organisms of these environments.

10. Dichlorodiphenyltrichloroethane C14H9Cl5

11. Ecosystem Disruption
The destruction or ________________________ in the ________________ of natural ecosystems.
This may lead to the ________________ of whole species or even _________________.
______________ Species- a species that affects many other species within an ecosystem
Extinction- the death of every member of a species
a species _____________________ of becoming extinct

12. Sustainability
The ability to meet human needs in order to survive _____________
Ecological Footprint- _____________ of human impact on Earth which considers people’s use of food, natural resources, and ____________ of waste and _______________.
To live sustainably is a _____________ both financial and ethical.

13. Questions for Review
Explain, in steps, how CFCs damage the ozone layer.
Explain how pesticides such as DDT undergo Biological Magnification.