There's lots of info and tech development for decarbonizing the power and automotive industry. A couple of really hard ones are industrial processes and are equally important.
Steel making represents 7-9% of direct emissions as they use coal for both direct heat and for adding the carbon necessary to make steel from iron. One company has developed a scalable way to make carbon free steel:
https://www.forbes.com/sites/scottca...il-free-steel/
Another incredibly hard one is concrete. I'm not sure anyone really had a good solution here. There's concrete made from direct carbon capture but it's insanely expensive and the world needs cheap concrete. The emissions arise from 3 different parts of the process, fossil fuel heat to turn
Some possible solutions are using direct air capture and sequestration, using alternative ingredients, or using carbon absorbing microbes in the process. Most of these are not really scalable though as microbes don't absorb near enough, alternative ingredients mostly come from processes like steelmaking that also need to end, and there just isn't close to enough alternative ingredients for it to work. The other complicating factor is that much of the CO2 produced is from the concrete curing which it does where it's laid. How do you capture that? This one will be difficult but at least 30% could be abated by avoiding using fossil fuel heating at least. Let's hope someone smart figures this out soon
https://www.scientificamerican.com/a...limate-change/