Sulphate particles, meanwhile, survive only a few years in the atmosphere.

而硫酸盐微粒方案只能在短暂的几年内有效。

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Injecting sulphate particles into the stratosphere, for instance, would cool the Earth by reflecting more sunlight into space.

向平流层喷洒硫酸盐颗粒，可以通过反射阳光达到降低地球温度的作用。

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Natural sulphate particles in the upper atmosphere lowered global temperatures by 0.5 degrees Celsius in less than a year following the eruption of Mount Pinatubo in the Philippines in 1991.

1991年，菲律宾的品纳士玻火山爆发不到一年，上层大气中的自然硫酸盐微粒就使全球气温降低了0.5摄氏度。

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Volcanoes have massive impacts on the stratospheric load of these tiny sulphate particles.

BBC: More sulphur trails from the stratosphere

Ozone-destroying reactions happen faster on surfaces, such as those provided by sulphate particles, than they do in the open air.

ECONOMIST: Geoengineering

Chemical reactions on the volcanic sulphate particles blasted into the stratosphere by the eruption accelerated ozone depletion over the southern hemisphere by about 3%.

BBC: News | Sci/Tech | Ozone hole reaches record size