Transcript SLOWING DOWN BIOSPHERIC CHANGE

SLOWING DOWN BIOSPHERIC
CHANGE
John Cairns, Jr.
University Distinguished Professor of Environmental Biology Emeritus
Department of Biological Sciences
Virginia Polytechnic Institute and State University
Blacksburg, Virginia 24061, U.S.A.
November 2010
FOR APPROXIMATELY 200,000 YEARS, HOMO
SAPIENS HAS FOUND EARTH TO BE TOLERABLE, IF NOT
IDYLLIC, AND THE SPECIES HAS INCREASED SINCE THE
AGRICULTURAL REVOLUTION FROM A FEW MILLION TO
NEARLY 7 BILLION.
IN THE LAST PART OF THE 20TH CENTURY AND THE
BEGINNING OF THE 21ST CENTURY, RAPID CLIMATE
CHANGES AND DAMAGE TO THE BIOSPHERE HAVE
INCREASED THE RISKS TO HOMO SAPIENS MARKEDLY.
 For example, Ecological Overshoot Day occurred on 21 August in 2010.
 Ecological Overshoot Day marks the point in time when the resources
Earth can regenerate in one year have been exhausted
([email protected]).
 This ecological overshoot is not sustainable  especially when the
human population is increasing exponentially and arable land is being
lost.
HARM ALREADY DONE TO THE BIOSPHERE AND THE
CLIMATE SYSTEM WILL REQUIRE HUMANKIND TO
ADAPT TO EXISTING AND NEW CONDITIONS FOR AT
LEAST A CENTURY  PROBABLY MORE.
 Since most climate and biospheric changes will be irreversible,
adaptation is necessary for human survival.
 If business as usual continues (e.g., increased emissions of
anthropogenic greenhouse gases), the rate of global change and,
consequently, the rate of adjustment needed for survival will increase.
THE NEED FOR HUMANKIND TO ADAPT WILL NOT BE
TRANSIENT.
 If anthropogenic greenhouse gas emissions continue to rise, if damage to
the biospheric life support system continues, if acidification of the
oceans has a major effect upon fisheries and other food resources, then
the rate of global change will continue.
 If the positive feedback loops (e.g., carbon dioxide) are fully activated,
runaway climate change will make continual, rapid adjustment
mandatory.
 Sustainable use of the planet is much discussed, but the discussions have
had little or no discernible effect upon ecological overshoot, human
population growth, and transition to non-carbon energy sources (e.g.,
wind, solar).
SCIENCE MAKES DECISIONS BASED ON THE
PREPONDERANCE OF EVIDENCE FROM PEER-REVIEWED,
SCIENTIFIC JOURNALS, BUT THE NEWS MEDIA AND THE
GENERAL PUBLIC DO NOT.
 The assault on science and scientists is intensifying and is dramatically altering
Earth’s biospheric life support system and increasing the risk to humankind.
 The situation would be vastly improved if efforts to cast doubt about science
and scientists are diminished or ceased.1
 Individuals who cast doubt on science and scientists rarely have published in
scientific journals, have no alternative plan of action, and sometimes no
scientific credentials, but their doubts make good news stories.
 These deniers eventually have been discredited repeatedly, but the news media
continue to include them as news and many citizens continue to believe them.
NOT TO KNOW WHAT HAS BEEN TRANSACTED IN
THE PAST IS TO BE ALWAYS A CHILD.
CICERO
 Part of the needed improvement in scientific literacy about climate
change is understanding the link between recent and historic data.
 An informed citizenry is essential to a democracy, which means an
adequate level of scientific literacy in the 21st century.
 The major problem is increasing literacy about the major, interactive,
global crises (human economy, climate change, exponential human population growth,
ecological overshoot, biotic impoverishment and the reduction of biodiversity, renewable
resource depletion, energy allocation, and environmental migrants) so that informed
action replaces talk about these crises.
HOW CAN SCIENTISTS BE PERSUADED TO COMMUNICATE HOW
SCIENCE WORKS TO THE GENERAL PUBLIC AND THREATS TO THE
BIOSPHERE AND THE EIGHT INTERACTIVE GLOBAL CRISES, AND, IF
THEY AGREE TO DO SO, HOW CAN THE GENERAL PUBLIC BE
PERSUADED TO SPEND TIME EXAMINING THE MATERIAL THE
SCIENTISTS PRODUCE?
 Most academics are not highly literate about global systems-level problems (e.g.,
climate), but a modest amount of reading should bring them up to speed for the
basics.
 In fields, such as climate change, much new information is being generated 
one must determine how recent the information is as well as the qualification of
the scientists providing the information.
 The news media, politicians, and the general public are not alarmed by the
catastrophes that will result if humankind continues business as usual.
 People seem indifferent to catastrophes distant in time or space.
 The United States dollar dropped significantly in value on August 24, 2010,
increasing the price of all imported goods  one more worry to distract the
American consumer from the global crises.
 Until the global crises are perceived as immediate, business as usual will
continue.
UNLESS IMMEDIATE ACTION IS TAKEN TO REDUCE THE
PROBABILITY OF THE EIGHT CRISES BECOMING CATASTROPHES,
THE CRISES WILL WORSEN.2
 Runaway climate change is becoming increasingly probable.
 Climate change is already having severe impacts on global agricultural productivity,
which is declining due to droughts, floods, climate change (temperature), and loss of
arable lands, but the human population is still growing exponentially.
 The damage to the biospheric life support system must cease or the present biosphere
will be replaced with a biosphere almost certainly less favorable to Homo sapiens.
 How can the human population be reduced to be within Earth’s carrying capacity when
discussions of population control are virtually taboo?
 The global shift to renewable energy is promising,3 but will the shift reduce emissions of
anthropogenic greenhouse gases rapidly enough?
 Toxic chemicals, most recently endocrine disrupters, are still a major hazard to human
health and the biosphere.
 Species are the basic components of the biosphere so serious declines in biodiversity
should be a major priority.
 Unless a precipitous decline occurs in the human population (e.g., pandemic diseases),
the cornucopian era is over  MORE will not always be available and resources per
capita will be fewer and more expensive.
Acknowledgments. I am indebted to Darla Donald for transcribing the
handwritten draft and for editorial assistance in preparation for publication.
References
1Pooley,
E. 2010. The Climate Wars. Hyperion, New York, NY.
2Cairns, J., Jr. 2010. Threats to the biosphere: eight interactive global crises.
Journal of Cosmology 8:1906-1915.
3Brown, L. R. 2010. A global shift to renewable energy. Earth Policy Institute
24August http://www.earthpolicy.org/book_bytes/2010/pb4ch05_ss1atson.