Support manager Anna Simmons explained the bricks were created using soil excavated from construction sites which would otherwise go to landfill.
This was then combined with a newly-developed binder to make the bricks stronger.
However, Mr Hanein said the binder was not like the kind used in traditional bricks which is created by heating limestone to about 1,000°C to create a material called lime.
He said this process created carbon dioxide as a by-product as well as requiring fossil fuels to be burned to reach the very high temperature.
Instead, he said his team had developed a way to create lime at room temperature which released carbon in a solid form instead of a gas.
Ms Simmons added the bricks were “fully recyclable” and, after being crushed, could then be turned into new bricks or used in soil as a fertiliser.
They are currently manufactured in Wuhan, China, then imported into the UK.
However, she said the company was planning to move production next year to further reduce its carbon footprint.