The Environment

Some Topics

 

YINYANG

Anthropocence

In the USA, the National Museum of Natural History renovated its exhibition space to feature a display of earth changes created by humans. Monsttersky writing in Nature (2015) stated:" This provocative exhibit will focus on the Anthropocene — the slice of Earth's history during which people have become a major geological force. Through mining activities alone, humans move more sediment than all the world's rivers combined. Homo sapiens has also warmed the planet, raised sea levels, eroded the ozone layer and acidified the oceans.Given the magnitude of these changes, many researchers propose that the Anthropocene represents a new division of geological time." The International Commission on Stratigraphy (ICS) , a consortium of mostly geological historians has owned the classification of earth epochs and some members argue that it is too early to classify Anthropocene as equivalent to a geological epoch.

The major changes in the planet wrought by humans are not in doubt, but bigger events (asteroid collision sun events, volcanoes, tsunamis) may suddenly occur and change everything. Monastersky suggested:" When Crutzen proposed the term Anthropocene, he gave it the suffix appropriate for an epoch and argued for a starting date in the late eighteenth century, at the beginning of the Industrial Revolution. Between then and the start of the new millennium, he noted, humans had chewed a hole in the ozone layer over Antarctica, doubled the amount of methane in the atmosphere and driven up carbon dioxide concentrations by 30%, to a level not seen in 400,000 years.

Agriculture, construction and the damming of rivers is stripping away sediment at least ten times as fast as the natural forces of erosion. Along some coastlines, the flood of nutrients from fertilizers has created oxygen-poor 'dead zones', and the extra CO2 from fossil-fuel burning has acidified the surface waters of the ocean by 0.1 pH units. The fingerprint of humans is clear in global temperatures, the rate of species extinctions and the loss of Arctic ice… This week in Nature, two researchers propose that a potential marker for the start of the Anthropocene could be a noticeable drop in atmospheric CO2 concentrations between 1570 and 1620, which is recorded in ice cores. They link this change to the deaths of some 50 million indigenous people in the Americas, triggered by the arrival of Europeans. In the aftermath, forests took over 65 million hectares of abandoned agricultural fields — a surge of regrowth that reduced global CO2."  [i]

[i] Richard Monastersky. Anthropocene: The human age. Momentum is building to establish a new geological epoch that recognizes humanity's impact on the planet. Nature 11 March 2015

 
  • Discussions of Environmental Science and Human Ecology were developed by Environmed Research Inc. Sechelt, B.C. Canada. Online Topics were developed from the 2017 book, The Environment. You will find detailed information about the sun, weather, soils, forests, oceans, atmosphere, air pollution, climate change, water resources, air quality, energy sources, and preserving habitats. The Environment is available from Alpha Online as a Printed book or as an eBook Edition for Download.
    The Authoris Stephen Gislason MD
  • Download The Environment as an eBook.

  • Also Read Air and Breathing.
    This book helps you understand air quality issues, normal breathing and the causes of breathing disorders.
     

    Persona Book Orders

    Click Add to Cart buttons to begin an order for mail delivery (US and Canada). All books can be downloaded as PDF files. Click the Download buttons to order eBooks for download. Click the book titles (center column) to read topics from each book.

    Print Books Read Topics Download
    Human Nature
    The Good Person
    The Puzzle
    The Environment
    The Sound of Music
    Surviving Human Nature
    Language and Thinking
    I and Thou
    Emotions and Feelings
    Neuroscience Notes
    Human Brain
    Children and Family
    Intelligence
    Religion, 21st Century

    Google Search Alpha Online

     
    Alpha Online

    alpha online

    Alpha Online is a Web Site developed by Environmed Research Inc. Sechelt, B.C., Canada. Online Since 1995. Orders for printed books, eBooks and nutrient formulas are placed at Alpha Online. Alpha Nutrition is a registered trademark of Environmed Research Inc.