Dust 2 (IMAGE) Stanford University Caption A man walks through a sandstorm in Chad, home of the Bodélé Depression - the largest source of dust emissions in the world. Credit George Steinmetz Usage Restrictions Journalists may reuse the image, with credit, in relation to the study discussed in this press release only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.