Pinpointing the sources of trans-pacific dust

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Airborne dust from Asia travels across the Pacific passport-free, carrying pollution, building soil, and coloring sunsets thousands of miles from its source. Identifying that source is important for understanding atmospheric circulation, contaminant pathways, and climate. But collecting enough airborne dust to pinpoint its source is challenging. Now, a team of researchers has developed a way to match microscopic quartz grains to the desert they blew in from.

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