Scientists Strengthen Concrete By 30 Percent With Used Coffee Grounds - According to a team of researchers from RMIT University in Australia, coffee groun... - https://science.slashdot.org/story/23/08/24/2358232/scientists-strengthen-concrete-by-30-percent-with-used-coffee-grounds?utm_source=rss1.0mainlinkanon&utm_medium=feed #java