A million block milestone has been reached by Scottish part recycled block manufacturer Brand and Rae, in Bonnyrigg.
In the past 18 months, 30% recycled glass has replaced the primary aggregate in the companys building blocks.
A Viridor glass recycling plant near the block factory provides crushed glass for use in the blocks. This resembles coarse sand is produced from low grade container glass.
The manufacturer said that its product is helping builders to satisfy local authority requirements that construction projects should use 10% recycled materials.
Viridor Glass Recycling operations manager Jamie McBride said: "With one of Brand and Rae's factories adjacent to our site we are really helping to make a big difference to the carbon footprint of this essential building material.
Together we are saving on energy, transport, and emissions, and by using this material there is less damage to the countryside through quarrying."
Image: Jamie McBride (L) and Gary Bell with handfuls of the crushed glass and some of the one million blocks that it is used in.