What the Industrialists of the world and their Bankers do not want you to see is that the oceans are depleted, the atmosphere is seriously screwed up (not just with green house gases), and the land has effectively been stripped. Humanity has literally sucked the resources out of this planet, goaded on by religious and political leaders.
http://www.scienceagogo.com/news/20090824001733data_trunc_sys.shtml
24 September 2009
New doomsday map shows planet’s dire state
by Kate Melville
Human activities have already pushed the Earth beyond three of the planet’s biophysical thresholds, with consequences that are detrimental or even catastrophic for large parts of the world, conclude 29 European, Australian and U.S. scientists in an article in Nature. This force has given rise to a new era – Anthropocene – in which human actions have become the main driver of global environmental change.
Using an interdisciplinary approach, the researchers looked at the data for each of the nine vital processes in the Earth system and identified a critical control variable. Biodiversity loss, for example, is based on species extinction rate, which is expressed in extinctions per million species per year. They then explored how the boundaries interact. Here, loss of biodiversity impacts carbon storage (climate change), freshwater, nitrogen and phosphorous cycles, and land systems.
The researchers stress that their approach does not offer a complete roadmap for sustainable development, but does provide an important element by identifying critical planetary boundaries. They also propose a bold move: a limit for each boundary that would maintain the conditions for a livable world. For biodiversity, that would be less than 10 extinctions per million species per year. The current status is greater than 100 species per million lost per year, whereas the pre-industrial value was 0.1-1.
“Three of the boundaries we identify – 350 parts per million of atmospheric carbon dioxide, biodiversity extinction rates more than 10 times the background rate, and no more than 35 million tons of nitrogen pollution per year – have already been exceeded with fossil fuel use, land use change, and agricultural pollution, driving us to unsustainable levels that are producing real risks to our survival,” notes report co-author Diana Liverman, of the University of Arizona.
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We are in the midst of a very large extinction event that we are essentially causing…
Mass extinctions require 2 events. In other words the Dinosaurs didn’t evolve into birds because of a single event…the comet strike. What happened was they filled every niche, ate themselves out of house and home. Probably started eating themselves, thus the gigantisism movement AND then the comet struck. Humans are heading for the same fate.
http://dsc.discovery.com/news/2009/02/17/mass-extinction-theory.html
Mass Extinctions May Follow One-Two Punch
Michael Reilly, Discovery News
The “Press” | Discovery News Video
Feb. 17, 2009 — As agents of extinction, comet and asteroid impacts may be losing their punch.
According to a new theory about how mass dyings work, cosmic collisions generally aren’t enough to cause a major extinction event. To be truly devastating, they must be accompanied by another event that inflicts long-term suffering, like runaway climate change due to massive volcanic eruptions.
In other words, a comet couldn’t have killed the dinosaurs by itself — unless they were already endangered species.
This kind of one-two punch could explain more than the extinction of dinosaurs, Nan Arens of Hobart and William Smith Colleges said. In a recent paper in the journal Paleobiology, she and colleague Ian West argue that there are two types of events that can cause extinctions — “pulses” (quick, deadly shocks, like comets) and “presses” (drawn-out stresses that push ecosystems to the brink but may not kill outright, like million-year-long volcanic eruptions).
The chances of mass dyings go way up when both happen together, argues Arens.
WATCH VIDEO: What constitutes a mass extinction?
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But are all mass extinctions created equal? Can researchers come up with a “Grand Unified Theory” of ancient apocalypse?West and Arens think so. They combed the last 300 million years of geologic record, noting impact craters, massive eruptions, periods of ancient climate change, and then comparing them to extinctions. The rate at which species die off spiked dramatically, they found, when a “pulse”-type event occurred within a million years or so of a “press.”The theory fits well for the dinosaurs. Around the time of their demise 65 million years ago, a comet slammed into the Yucatan Peninsula and a huge volcano, the Deccan Traps, was erupting in what is today India.
But other extinctions are problematic. The greatest dying in geologic history, the Permian-Triassic extinction, killed 90 percent of all life on Earth, but there is no record of an impact. Instead, all signs point to a 200,000-year-long volcanic eruption in Siberia as the murder weapon.
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