Dust to stave off climate change?

http://www.newscientist.com/article/mg21128245.000-ironrich-dust-fuelled-4-million-years-of-ice-ages.html

Researchers may have found a solution for staving off climate change, in iron rich dust.  Researchers claim, during the ice ages, the ice ages were fuelled by this iron rich dust. When blown into the sea, the iron the dust contains can fertilize plankton on a large enough scale to cause global temperatures to decrease.  This finding supports recent ideas to use dust to help cool down the earth, perhaps by sprinkling iron filings into the ocean.  Evidence for this has been found in ice cores in Antarctica, showing lots of dust in the air coinciding with low atmospheric CO2 levels during recent ice ages.  So far however, the tests have been done on too small a scale to demonstrate any lasting effect.  This could be a great way to help the earth’s climate change at the very least, slow down.  However, before put into practice, researchers should be 100% sure that doing this will not affect the earth in yet another harmful way.