What about all the other forms of pollution? This article focuses entirely on CO2. Do these newer cement alternatives have fewer waste products too, or more? Are those waste products recyclable?
CO2 feels like just a weird focus, compared to the toxic lakes of sludge in China near manufacturing hubs, the massive drifts of plastic in our oceans, the coal ash pools at all our coal plants, the nuclear waste still kept at all our nuclear plans, and all the other waste and pollution we product. Reducing one at the expense of another may not always end up in a good net result.
This article totally ignores all the other factors of pollution and doesn't take an fully balanced look at all the waste produced in these materials.
Ultimate to reduce harm to our environment we need to produce less entirely. That does mean fewer buildings, cell phones, new things, etc. But no one really talks about that.