It is one small step — and it involves cement.
At a recent conference, I learned about a new startup company that is sequestering carbon in cement as it is being made. See what CarbonCure Technologies is doing: This concrete (yes, concrete) is going high-tech.
Is this one application of technology going to change the world? No, but it is an example of how we can use multiple technologies to reduce our carbon footprint as we continue to build new infrastructure. There isn't a single application that will "change everything."
Individually, and as organizations and nations, we each need to do our part.