Environmental Science Introduction Doing Science.
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Transcript of Environmental Science Introduction Doing Science.
![Page 1: Environmental Science Introduction Doing Science.](https://reader035.fdocuments.in/reader035/viewer/2022062421/56649f465503460f94c68591/html5/thumbnails/1.jpg)
Environmental Science
Introduction
Doing Science
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Environmental Science
Interdisciplinary study of humanity’s relationship with other organisms and the nonliving physical environment.
Encompasses many complex and interconnected problems Human numbers Natural Resources Pollution
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Environmental Sustainability
Ability of the environment to function indefinitely without going into a decline from the stresses imposed by human society on natural systems that maintain life
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Non-Sustainable Human Behaviors
Using nonrenewable resources as if they were present in unlimited suppliesUsing renewable resources faster than they can be replenished naturallyPollution the environment with toxins as if the capacity to absorb them were limitlessIncreasing in numbers despite the Earth’s finite ability to support us.
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Factors Contributing to Environmental Degradation
Population
Consumption
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Environmental Impacts
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Thomas Multhus and Population
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Human Population Growth
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Pollution, Population and Consumption
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Endocrine Disrupters
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Overfishing: Georges Bank
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Subsistence Fishing
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Factory Fishing Boat
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Overfishing
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Declining Bird Populations
Habitat fragmentation
Nest parasitism
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Nest Parasitism and Habitat Fragmentation
Fragmentation of habitat for songbirds is a result of development
Increases edges
Associated with increased populations of cowbirds
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Reintroduction of Wolves
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Exotic Species
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Stratospheric Ozone Depletion
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Global Warming
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Global Warming
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Atmospheric Carbon Dioxide
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Rain Forest Destruction
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Addressing Environmental Problems
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Components to Addressing an Environmental Problem
Scientific Assessment
Risk Analysis
Public Education
Political Action
Follow-through
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Scientific Method
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Decision Making and Risk Assessment
Hazard Identification
Exposure Assessment
Toxicity Assessment
Risk Characterizatin
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Perception of Risk
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Dose-Response: Threshold
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Dose-Response: No Threshold
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Cancer Slope Factor
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Mixtures of Chemicals
Additivity
Synergy
Antagonism
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Risk Assessment Focus
Human Health
Ecological
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Assessing and Managing an Environmental Problem: A Case Study
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Lake Washington
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Phosphorous and Lake Washington
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Phosphorous and Algal Blooms
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Transparency