Marés negras - mais naturais do que se pensa
Via Carlos Novais @ Facebook, Petroleum seep (Wikipedia):
A petroleum seep is a place where liquid or gaseous hydrocarbons escape to the ground surface. The hydrocarbons may escape through fractures and fissures in the rock, between geological layers, or directly from an oil-bearing outcrop.Natural Oil Seeps vs. Oil Spills:
A 2003 National Academies study estimated that about 980,000 barrels of oil, or about 41 million gallons, seep into the Gulf - every year. Recall that the Exxon Valdez is estimated to have spilled about 250,000 barrels.Oil "Seeps": Nature's Biggest Oil Spills:
The bottom line in all this discussion is that oil spills – even big ones – are natural occurrences. Those hydrocarbons are used as food and fertilizer by the bacterial life that sits at the bottom of local food chains. While we shouldn’t be in the business of making large messes, neither should we fall all over ourselves decrying the ultimate catastrophe when none exists. And we certainly should not use this as yet another vehicle to grow a large, ineffective, intrusive and overbearing government agency centered in Washington DC.
tema por António Costa Amaral em 12:14 - URL -
6 Comentários:
O ponto relevante:
The question we are trying to answer here is, "how are oil seeps different from oil spills?" Oil seeps occur constantly, throughout the Gulf. Although they do release a lot of oil together over time, their individual spill rates are far, far lower than the Deepwater Horizon gusher. What's more, these much smaller seeps are dispersed around the Gulf, so each seep's oil can be degraded quickly.
That is not what happens in an oil spill. It is true that the amount of oil that has spilled from this gusher so far is less than the ANNUAL AGGREGATE of all 600+ seeps in the Gulf. But it's all coming out at the same time, in the same place. The water in one location can only degrade so much oil at one time; an oil spill goes far beyond overwhelming the ocean's natural oil-coping mechanisms.
"at one time"
Já agora, também poderiamos escrever um texto "Morte de humanos - mais natural do que se pensa" (sabiam que para cada homicidio há montes de pessoas que morrem de morte natural?)
ou dizer besteiras, quando há tanta besteirada a acontecer naturalmente
>"at one time"
Sinceramente, não estou a perceber o que o AA quer dizer com esse "at one time"...
O que impressiona é que o estardalhaço do Green Peace com o Prestige ou o Exxon Valdez foi bem maior que com a BP. Corre dinheiro das petrolíferas para estes ambientalistas de salão de manicure
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