A team of researchers from Sctoland has employed ultrasound technology to clean up organic wastes from factory
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/sound-option
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-herald-bangalore
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-science