The conference also gave him the opportunity to promote another Carbon Sciences venture: turning CO2 into precipitated calcium carbonate.

CNN: Turning carbon dioxide into fuel

Carbon Sciences are just one of many companies all over the world who are beavering away trying to find effective methods of renewing CO2.

CNN: Turning carbon dioxide into fuel

He believes that Carbon Sciences' program sounds feasible.

CNN: Turning carbon dioxide into fuel

"Anything that reduces food miles and other carbon emissions linked to food production is normally a positive thing, " said Dr Nicola Canon, lecturer in crop sciences at the UK's Royal Agricultural College.

CNN: Farm in the city could be supermarket of the future