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Nalaka Gunawardene - Surviving Chemicals, Reporting Chemicals - 25 Sep 2012
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Transcript of Nalaka Gunawardene - Surviving Chemicals, Reporting Chemicals - 25 Sep 2012
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Surviving Chemicals & Making Sense of Them
By Nalaka GunawardeneScience Writer & Columnist
www.nalakagunawardene.comPresentation to Media workshop on scientific reporting
on chemical issuesOrganised by Centre for Environmental Justice
Colombo, 25 September 2012
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It’s All About Managing Risks! Modern life depends on 100s of
chemicals (going back to Stone Age not an option)
Toxicity depends on dose, exposure, resilience, etc.
100% chemical free life NOT POSSIBLE ANYWHERE ON EARTH
Understand risks; stay within tolerable levels
Don’t Demonise Science & Tech!
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5 Leading Lights in Public Science:Balancing Risk & Benefits
Rachel Carson (1907 – 1964) Alice Hamilton (1869 – 1970) Sherwood Rowland (1927 – 2012) Theo Colborn (1927 - ) Anil Agarwal (1947 – 2002)
Remind us there are HONEST, CONSCIENTIOUS SCIENTISTS too!
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Rachel Louise Carson (1907-1964):Inspired Environmental Movement Marine biologist Worked for US Bureau of
Fisheries Became nature writer in 1950s:
original books on oceans Late 1950s: Turned attention to
impacts of pesticides on animals, ecosystems – humans?
Most important book: 1962…
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50 Years ago, in 1962:A book that changed the world… This is the way
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Quick Impact… This is the way
ththth
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US Senate subcommittee on pesticides, 1963 This is the way
ththth
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Alice Hamilton (1869 – 1970): Pioneer in Toxicology Trained as medical doctor
professor of pathology Studied industrial medicine &
occupational health issues First woman to join as teacher
of Harvard Medical School Pioneer in toxicology: what
are chemicals doing to our bodies?
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Adding Lead to Gasoline/Petrol 1924: Oil & car companies
introduce Tetra Ethyl Lead (TEL) to prevent petrol car engines ‘knocking’
To boost octane & raise compression ratios
Public health specialists: Lead is a well known poison!
Industry: “Don’t worry - Not harmful in small doses!”
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Singing Praise of Lead Additives…
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Counterpoint:Surely you can do better?“It would be foolish to talk of the industrial value of tetraethyl lead, when there is a health hazard involved. Men who could discover the fuel value of tetraethyl certainly could invent or discover something equally efficient and in no way dangerous. American chemists can do it if they will.” - Dr Alice Hamilton, 1925
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Evidence piles up over decades…1970: US finally bans lead in petrol… This is the way
ththth
Sri Lanka finally kicked lead addiction in 2002.
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Kicking out Lead in Petrol: A Rare Success Story worldwide
Developing countries followed North America & Europe Lead phased out in most countries by 1990s
Sri Lanka: State petroleum monopoly dragged its feet for dozen years, finally did so in 2002
Sustained evidence-based advocacy- story recalled in my recent column: http://collidecolumn.wordpress.com/2012/07/15/when-worlds-collide-24-kicking-lead-in-petrol-lessons-for-cleaning-up-dirty-diesel/
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Frank Sherwood Rowland (1927-2012): Saved Ozone Layer This is the way
ththth
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1974 - Sherwood Rowland & Mario Molina: “CFCs damage Ozone Layer” This is the way
ththth
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CFCs: Another ‘Wonder Chemical’ turns deadly after a few decades… This is the way
ththth
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Govts reacted quickly to new science…So many lives saved!
Montreal Protocol is estimated to have prevented (1987-2010): 19 million cases of non-
melanoma (skin) cancer 1.5 million cases of
melanoma cancer 130 million cases of eye
cataracts.
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Theo Colborn (1927 - ): Gender-Bender Detective Originally trained as a
pharmacologist PhD in zoology at age 58 Discovery in 1980s at Great
Lakes of North America: fish, birds, reptiles & mammals suffering from mysterious reproductive disorders
Male/female hormones affected – how & why?
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Theo Colborn as ‘Detective’… Industrial chemicals (in pesticides,
plastics & cosmetics, etc.) interfered with animals' endocrine systems, where hormones are regulated.
All chemicals had one thing in common: at molecular level, they were structurally similar to estrogen, female hormone: GENDER-BENDERS?
Colborn speculated: chemical pollutants responsible for lower sperm counts among men in Europe?
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Our Stolen Future, 1996 A new scientific discipline:
Endocrine disruption Still active at 85… What are all these chemicals
doing to human bodies, at chemical level?
Look beyond cancers to other effects too!
Researchers keep probing
www.endocrinedisruption.com
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Anil Agarwal (1947 – 2002):Holding Science Accountable IIT-qualified mechanical
engineer science journalist & eco campaigner
Reporter, Hindustan Times (India), New Scientist (UK)#
Founded Centre for Science & Environment (CSE), 1980
Started India’s Down to Earth magazine, 1992
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Evidence-based Advocacy:e.g. People’s Right to Clean Air
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Right to Clean Air – both outdoors AND indoors… Not just outdoor pollution
by vehicles & factories ALSO indoor pollution from
poorly ventilated kitchens Exposing millions of women
& children to respiratory illnesses & premature deaths
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Anil Agarwal asks in 1996: “My Story Today; Your Story Tomorrow?”
1994: Diagnosed with ocular & central nervous system Non-Hodgkin's Lymphoma (NHL)
“I learnt that the black lines in my eyes were cancer cells which had formed a sheet in front of the retina.”
1996 Down to Earth cover: his own story
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We are shaped by what we eat, drink & breathe…NO ESCAPE!
“As an environmental activist and writer, I have tried for years to promote nationwide concern about the deteriorating state of our environment. The idea of writing about my own travails as an environmental victim had, however, never crossed my mind. But obviously, I could not have escaped what was and is happening all around me.”- Anil Agarwal in 1996
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Covering Chemical Stories in Media:A few generic tips• ‘Chemical Pollution’ stories never
just that – there’s much more!• Complex links to govt policy,
regulation, industrial lobbies, technology options, etc, etc.
• Strong vested interests: money, power, intrigue!
• At stake: public health & lives • Hype & disinformation abound• But success stories too!
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How to cover complex, evolving environmental stories… Many stories are science-based… Ideal media coverage: informed by
science, but NOT IMMERSED in it! Chemical safety: environment +
business + health + politics + rights Science is a self-correcting process There are good scientists, too! LOOK FOR HIDDEN STORIES…
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Under-Reported Toxic Stories… Gradual poisoning of our bodies
and surroundings (too slow for Breaking News?)
Toxic chemicals mixed up in the air (e.g. Diesel fumes that cause cancer)
Chemicals used by public agencies & utilities (e.g. chlorine to purify drinking water)
HOW COME THESE GET AWAY WITHOUT MUCH SCRUTINY?
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Lead in petrol is gone…Our next challenge: sulphur in diesel?
June 2012: WHO Expert Group confirms diesel fumes definitely carcinogenic
Limited media reactionin Sri Lanka: WHY?
My column, 8 July 2012: ‘Slow Murder’ by Subsidised Diesel Fumes:http://collidecolumn.wordpress.com/2012/07/07/when-worlds-collide-23-slow-murder-by-subsidised-diesel-fumes/
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WHY ISN’T THIS CONFIRMED KILLER NOT GETTING AS MUCH PRESS AS SPECULATED “ARSENIC IN RICE”?
Cartoon courtesy: CSE India
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Diesel sulphur level in Sri Lanka: 3,000 parts per million (ppm); Contrast with India 350 ppm & Japan, 30 - 50 ppmDIESEL FUMES CAUSE CANCER: WHY ISN’T THIS A STORY?
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Advice to scientist-activists…“Scientists should first establish themselves as scientists, with a solid record of peer-reviewed achievement, THEN speak out in their area of expertise --loudly, if necessary.”- Edward O WilsonHarvard biologist, author
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Email: [email protected]
Blog: www.nalakagunawardene.com
Twitter: www.twitter.com/NalakaG
Asking Questions…
Connecting Dots…
Seeking Clarity…