Week 4

Tonight ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Preserving Earth’s Biological Diversity Chapter 17

Activity ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Causes of Species Decline

Importance of Diversity ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

Extinct Species ,[object Object],Continuous, slow rate of extinction over millions of years Numerous species disappear over geologically short time frame. -Major climate change

Extinct Species • Today, extinction rate is 100x - 1000x the background rate • In U.S., 250 species gone extinct since 1980

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Threatened species • Population declining rapidly • Likely to become endangered

[object Object],#1 threat to biodiversity is loss of habitat - destruction - fragmentation - degradation

[object Object],[object Object],Invasive Species

Human Causes of Species Endangerment ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Endangered and Extinct Species ,[object Object],[object Object],Illegal hunting: snow leopards Unregulated parrot trade

What Can We Do About Declining Biological Diversity? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Discussion ,[object Object],[object Object],[object Object],[object Object]

The Atmosphere as a Resource ,[object Object],[object Object],[object Object],[object Object],[object Object]

Types and Sources of Air Pollution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Ozone damage

[object Object],Chemical reactions generate secondary pollutants

Effects of Air Pollution ,[object Object],Respiratory track, eyes, blood

Air Pollution Around the World ,[object Object]

Regional and Global Atmospheric Changes Chapter 21

Global Climate Change Mean annual global Temperature, 1960-2003 Causes of Global Climate Change CO 2 in the atmosphere

[object Object],[object Object]

[object Object],[object Object],Melting permafrost 1957 1998

Effects of Climate Change ,[object Object],[object Object],[object Object],[object Object],[object Object]

Ozone Depletion in the Stratosphere ,[object Object],Normal levels of ozone Reduced levels of ozone

Ozone Depletion in the Stratosphere ,[object Object],Antarctica ,[object Object],[object Object]

The Effects of Ozone Depletion ,[object Object],Melanoma Some features • Irregular borders • Uneven color • Raised areas

Acid Deposition ,[object Object],[object Object]

Acid Deposition ,[object Object],[object Object],• Damage to leaves - reduced photosynthesis - more susceptible to stress - death of tree • Damage to soil : acidification - Ca, K readily wash out - damage to fungi that aid in root uptake - death of tree

Acid Deposition ,[object Object],[object Object],[object Object],[object Object],[object Object]

Types of Water Pollution ,[object Object],↑ Enrichment Explosion in algal, bacteria, & decomposer populations ↑ Biological oxygen demand ↓ Oxygen levels in water Fish kills

Water Quality Today ,[object Object],[object Object],[object Object],[object Object],[object Object]

Water Quality Today ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solid and Hazardous Waste Chapter 23

Solid Waste ,[object Object],[object Object],Solid waste produced by av. family of four in one year in US

Solid Waste ,[object Object],Note: most of the solid waste can be recycled but is not

Hazardous Waste ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Strategy for Sustainable Living ,[object Object],[object Object],[object Object],[object Object],[object Object]

A Review of the Central Themes of Environmental Science ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Review of the Central Themes of Environmental Science ,[object Object],• We evolved within and depend upon the web of life • Need to protect ecosystems; species Endangered sea turtle

A Review of the Central Themes of Environmental Science ,[object Object],Challenges of under developed countries - Distribution of resources - Economic growth - Scientists and Engineers

Addressing the Goals of Sustainability ,[object Object],[object Object],[object Object],[object Object]

Addressing the Goals of Sustainability ,[object Object],Family planning discussion Carrying Capacity of an ecosystem determined by its ability to - absorb wastes - renew itself

Implementing Environmental Sustainability at Various Levels ,[object Object],[object Object],[object Object],[object Object]

Implementing Environmental Sustainability at Various Levels ,[object Object],[object Object],[object Object],[object Object],[object Object]

Implementing Environmental Sustainability at Various Levels ,[object Object],Global alliances for global problems - U.N. Fish Stocks Agreement - Kyoto Protocol (Global Warming) - Montreal Protocol (Ozone Depletion)

What Kind of World Do We Want? ,[object Object],[object Object],[object Object],[object Object]

Week 4

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