How a high-tech twist on a 19th-century process could clean up steel and cement making
Greenhouse gas emissions need to virtually disappear within the next few decades to avoid the worst effects of climate change, and the most difficult emissions to erase could come from industries like steel and cement set to play a big role in new, green infrastructure. Wind turbines, for example, are made mostly of steel — but, at least until now, it’s been almost unheard of to make that steel using renewable energy.
That could start to change if a startup developing a “heat battery” can successfully move from the lab to the real world. It’s what Oakland, California-based Rondo Energy aims to do with $22 million in new funding from Bill Gates’ climate investment fund, Breakthrough Energy Ventures, and utility-backed investment firm...