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Shipping is by far the biggest transport polluter in the world. There are 760 million cars in the world today emitting approx 78,599 tons of Sulphur Oxides (SOx) annually. The world's 90,000 vessels burn approx 370 million tons of fuel per year emitting 20 million tons of Sulphur Oxides. That equates to 260 times more Sulphur Oxides
Volcanoes that release large amounts of sulfur compounds like sulfur oxide or sulfur dioxide affect the climate more strongly than those that eject just dust. The sulfur compounds are gases that rise easily into the stratosphere. Once there, they combine with the (limited) water available to form a haze of tiny droplets of sulfuric acid. These tiny droplets are very light in color and reflect a great deal of sunlight for their size. Although the droplets eventually grow large enough to fall to the earth, the stratosphere is so dry that it takes time, months or even years to happen. Consequently, reflective hazes of sulfur droplets can cause significant cooling of the earth for as long as two years after a major sulfur-bearing eruption. Sulfur hazes are believed to have been the primary cause of the global cooling that occurred after the Pinatubo and Tambora eruptions.
Originally posted by Arbitrageur
So if carbon tax is a penalty for causing global warming, what should be done about sulfur emissions which can temporarily create global cooling? Issue carbon credits? And I don't know how the balance shakes out between the effect of the sulfur and the effect of the CO2, the net effect may actually be a slight global cooling effect in the short term. But since the sulfur dissipates faster than the CO2 the long term effect is probably still warming.
But think about this. If it weren't for all that toxic sulfur those international shipping vessels emitted (which is a lot), global warming might actually be a lot worse than it already is!???
Something to think about.
Originally posted by XPLodER
reply to post by Arbitrageur
that is the most ironic thing huh,
polution staving off global warming
that really makes my head ache