A traditional base for an 11 x 13 paver or stone patio involves digging up and hauling out about six tons of dirt, and then ...

She was tired of seeing plastic littering the streets of Nairobi, and saw an opportunity to solve two problems at once — cleaning up the streets and paving them with plastic. Three years ago ...

These include Dr John Orr, a lecturer in concrete structures at Cambridge University. His research has found that plastic waste can be sorted, cleaned, shredded and crushed into a sand alternative ...