Creating concrete that is more friendly for the environment is a task that some companies are taking very seriously. Forbes contributor Laurie Winkless examines some of the products created by these companies that want to greenify concrete and the proccessof making it.

One company that she takes a look at is Cemfree, a British company whose claim to fame is making a cement-free form of concrete. The benefit associated with this type of concrete is a reduction in carbon-dioxide production, but skeptics doubt the practicality of cement-free concrete:

Cemfree claim that if theEmpireState Building had been built with their concrete, it would have produced 13,319 fewer tonnes of CO2. Many in the construction sector remain sceptical of the performance of this material. When researching for my upcoming book, I was told that producing concrete without cement was like ‘baking a cake without flour’

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