versus about 30 pounds per square foot for concrete pavers. Their weight makes them especially suitable for green roofs and ...

One company looking to spearhead the green concrete revolution is the Nordic/Dutch startup Paebbl, which has developed a process to take the carbon in CO2 and turn it into construction materials.

And now scientists in the U.K. have developed a “green” concrete that they say is more environmentally friendly than the ordinary stuff, as well as more durable and more than twice as strong.