Cement is one of the bigger unknown problems in the world regarding climate change. I think we can make a huge improvement by creating carbon negative concrete.
There are couple of different ways to create carbon negative concrete, but they keep on failing due to the industry and barriers. There is a great insightful article with an in depth analysis into why these techniques/companies fail: https://www.sciencedirect.com/science/article/pii/S221042241...
However,I don't see the cement industry changing anytime soon, so I expect innovation in the industry to come from less impactful angles (like http://c8s.co.uk/ and http://www.blueplanet-ltd.com/ ).
I think in the future we should create buildings that heal and store carbon instead of pollute tons of carbon dioxide. Magnesium based cements can have huge impact: https://pubs.acs.org/doi/abs/10.1021/acs.chemrev.5b00463
However,I don't see the cement industry changing anytime soon, so I expect innovation in the industry to come from less impactful angles (like http://c8s.co.uk/ and http://www.blueplanet-ltd.com/ ).
If anyone has other insights I'm really curious.