Class21

Class21 - Adverse Impacts of Technologies Environmental...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Adverse Impacts of Technologies Environmental movement begins (1962) Society assumes oversight of technologies Clean Air Act (CAA, 1970) Environmental Protection Agency (EPA, 1971)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Types of pollution discussed in Chem 83 Nebel/Wright, Environmental Science, 7th, Prentice Hall, NJ, 2000, 477
Background image of page 2
Cunningham/Saigo, “Environmental Science”, McGraw, 2001, 19. In 1962 society became aware of environmental problems In 1962 Rachel Carson published a book, Silent Spring , in which she correlated the loss of song birds to the bioaccumulation of DDT insecticide in the environment. She died in 1964 without knowing that she had started the environmental move- ment. Her contributions were recognized when she was awarded the Presidential Medal of Freedom in 1980.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Congress responded to concerns of public with CAA and EPA CAA, Clean Air Act, 1970, authorized the development of comprehensive federal and state regulations to limit emission of pollutants into air EPA, Environmental Protection Agency, was created on May 2, 1971 in order to implement the various requirements included in the CAA of 1970 http://www.epa.gov/air/caa/caa_history.html
Background image of page 4
Environmental Protection Agency was given a broad charge and broad authority Charge Protect ecosystems Protect materials Protect visibility in troposphere (portion of atmosphere nearest earth) Authority Set standards for pollutants Monitor for violations of standards Enforce compliance with standards (fines) http://www.epa.gov/air/airtrends/sixpoll.html
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Atmosphere is divided into regions based on changes in temperature. Troposphere and stratosphere make up 99.9% of mass of atmosphere. Cunningham/Saigo, Environmental Science, 6th,McGraw-Hilll, NY, 2001, 376 EPA focused on the atmosphere first
Background image of page 6
Six principal pollutants were to be regulated by EPA under Clean Air Act (1970) CO - carbon monoxide PM - particulate matter (PM) SO x - sulfur oxides NO x - nitrogen oxides O 3 - ozone (tropospheric) Pb - lead Each will be briefly described http://www.epa.gov/air/oaqps/peg_caa/pegcaa11.html
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Risks : CO bonds 200 times more tightly to hemoglobin than does oxygen causing oxygen deprivation to living cells. Can cause death. Hill/Kolb, Chemistry for Changing Times, 7th, Prentice Hall, NJ,1995, 353 Carbon monoxide (CO) Source : Burning fossil fuels in limited oxygen, 2 C 8 H 18 + 17 O 2 18 H 2 O + 16 CO Natural fate : 2 CO + O 2 2 CO 2 (slow) Hill/Kolb, Chemistry for Changing Times, 7th, Prentice Hall, NJ,1995, 353
Background image of page 8
http://www.epa.gov/airtrends/carbon.html EPA has decreased [CO] with caps The blue band shows the distribution of air pollution levels among the trend sites, displaying the middle 80  percent. The white line represent the average among all the trend sites. Ninety percent of sites have  concentrations below the top line, while ten percent of sites have concentrations below the bottom line.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
http://www.air-quality.org.uk/images/25a.jpg
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/19/2011 for the course CHEM 83 taught by Professor Bonk,j during the Fall '08 term at Duke.

Page1 / 57

Class21 - Adverse Impacts of Technologies Environmental...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online