Rio+20

Diverse — Drokles on June 21, 2012 at 6:54 am

Belært af at klima ikke længere sælger så godt prøver FN systemetat tilegne sig magt gennem frygt for tab af biodiversitet skriver Paul Driesen i Washington Times

First, there is no scientific basis for claims that hundreds or even thousands of species are at risk. Up to half of all species could go extinct by 2100, insists global-warming alarmist James Hansen, because of climate change, “unsustainable” hydrocarbon use, human population growth and economic development. Fortunately, there is no factual basis for such hysterical claims.

Of 191 bird and mammal species recorded as having gone extinct since 1500, 95 percent were on islands, where humans and human-introduced predators and diseases wrought the destruction, notes ecology consultant Craig Loehle. On continents, just six bird and three mammal species were driven to extinction, and no bird or mammal species in recorded history is known to have gone extinct because of climate change.

The massive species losses claimed by Mr. Hansen, Greenpeace, World Wildlife Fund and others are based on extrapolations from the island extinction rates - fed into virtual-reality computer models that assume rising carbon-dioxide levels will raise planetary temperatures so high that plants and animals will be exterminated. That is nonsense.

Second, the greatest threats to species are the very policies and programs being advocated in Rio. Those policies would ban fossil fuels; greatly increase renewable energy use; reduce jobs and living standards in rich nations; and perpetuate poverty, disease, death and desperation in poor countries.

Today, more than 1.5 billion people still do not have electricity, or have it just a few hours each day or week. Almost 2.5 billion people live on less than $2 a day. Millions die every year from diseases that largely would be eradicated by access to reliable, affordable electricity for refrigerators, clinics and hospitals, clean water, sanitation, and industries that generate jobs, prosperity and health.

Opposition to conventional electricity generation forces people to rely on open fires for cooking and heating - perpetuating lung diseases and premature death from breathing smoke and pollutants. It also destroys the habitats for gorillas and other wildlife as people cut trees and brush for fires and charcoal.

Og at man tvinger folk til at leve i fattigdom og bruge åben ild slider på skovene. Heldigvis er de fleste regeringer mere ansvarlige for deres folk end for de idealer der ser mennesket som en cancer på kloden. Den økonomiske vækst er lig med urbanisering og urbanisering er lig med fossile brændstoffer, der letter trykket på skoven forklarer Damefrokosten

Regnskov bliver fældet; det ved vi alle. Det handler hvert år om arealer svarende til cirka halvanden gang Danmarks størrelse, og det bevirker, at arter uddør, og at enorme mængder CO2 bliver sluppet ud i atmosfæren.

Her er noget, der er mindre kendt: Der kommer også hele tiden ny regnskov til, og sammenlagt med anlagte plantager kan det handle om arealer, der er næsten lige så store som dem, der bliver fældet. Der mangler i den grad viden på området, men hvad man ved nu er, at den nye regnskov opstår langt hurtigere end tidligere antaget.

Fænomenet skyldes blandt andet urbaniseringen. Folk i de tropiske områder flytter mod byerne, og de lader landet ligge ubrugt bag sig. Og så går det hurtigt. Som en tommelfingerregel er 80 procent af regnskovens biomasse gendannet efter 20-25 år, oplyser professor seniorforsker Joe Wright fra Smithsonian Tropical Research Institute i Panama.

Heden springer, som bekendt i skov, hvis ikke den bliver vedligeholdt. Dr. Tim Ball giver et eksempel fra et af sine feltstudier af trægrænsen i Canada.

In my research I found a map drawn by fur trader and biologist Samuel Hearne in 1772. He followed the tree line (he called it the “woods edge”) from Churchill on the southwest coast of Hudson Bay to the Coppermine River on the Arctic coast and plotted it on a map. It’s a very distinct boundary as I know from flying over this region for five years.

Hearne made a remarkable, astute, comment in his journal.

“I have observed, during my several journeys in those parts that all the way to the North of Seal River the edge of the wood is faced with old withered stumps, and trees which have been flown (sic) down by the wind. They are mostly of the sort which is called here Juniper, but were seldom of any considerable size. Those blasted trees are found in some parts to extend to the distance of twenty miles from the living woods, and detached patches of them are further off; which is proof that the cold has been increasing in those parts for some ages. Indeed, some of the older Northern Indians have assured me that they have heard their fathers and grandfathers say, they remembered the greatest part of those places where the trees are now blasted and dead, in a flourishing state. (Hearne, 1772, p.138).

His observations fit the record. The tree line advanced during the warm of the Medieval Warm Period (MWP) then retreated in the cooling to the nadir of the Little Ice Age (LIA). It has warmed since and the tree line has advanced. The pattern of movement is appropriate for the general circulation of the region.

After plotting the woods edge as Hearne drew it in 1772 with the tree line 200 years later the amount of movement is significant. In the west/east portion movement was up to 200 km. This means it moved one kilometer per year, which most believe is impossible. However, even if it was only half that it is more than most would accept.

Trægrænsen er de yderste vilkår under hvilke træer kan vokse.

1 Kommentar »

  1. Der ligger et meteorkrater i Arizona, USA. Man mener at cirka 96 % af alle dyrearter kradsede af på grund af de fatale følger, som meteoren forårsagede. Jorden blomstrer i dag af liv, hvilket må indebære, at nye arter er kommet til. Det er for mig ligegyldigt, at en meget sjælden venezualesisk fugl, som kun spiser bark fra mahognitræer, uddør. Der kommer nok en ny art et andet sted. Mange undervurderer i høj grad naturen. Lige meget hvor mange tæsk menneskene giver den, vil den altid bestå. Lidt CO2 her og der gør ingen forskel

    Comment by Gammelfar — July 8, 2012 @ 6:11 pm

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