Environmental Science Introduction Doing Science.
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Transcript of Environmental Science Introduction Doing Science.
Environmental Science
Introduction
Doing Science
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
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
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.
Factors Contributing to Environmental Degradation
Population
Consumption
Environmental Impacts
Thomas Multhus and Population
Human Population Growth
Pollution, Population and Consumption
Endocrine Disrupters
Overfishing: Georges Bank
Subsistence Fishing
Factory Fishing Boat
Overfishing
Declining Bird Populations
Habitat fragmentation
Nest parasitism
Nest Parasitism and Habitat Fragmentation
Fragmentation of habitat for songbirds is a result of development
Increases edges
Associated with increased populations of cowbirds
Reintroduction of Wolves
Exotic Species
Stratospheric Ozone Depletion
Global Warming
Global Warming
Atmospheric Carbon Dioxide
Rain Forest Destruction
Addressing Environmental Problems
Components to Addressing an Environmental Problem
Scientific Assessment
Risk Analysis
Public Education
Political Action
Follow-through
Scientific Method
Decision Making and Risk Assessment
Hazard Identification
Exposure Assessment
Toxicity Assessment
Risk Characterizatin
Perception of Risk
Dose-Response: Threshold
Dose-Response: No Threshold
Cancer Slope Factor
Mixtures of Chemicals
Additivity
Synergy
Antagonism
Risk Assessment Focus
Human Health
Ecological
Assessing and Managing an Environmental Problem: A Case Study
Lake Washington
Phosphorous and Lake Washington
Phosphorous and Algal Blooms
Transparency