Concrete is second after water

[freebeard]

The second most used material is energy intensive. But here's a way to reclaim old concrete by using it as input to the steelmaking process.

This Breakthrough Could Change Cement Forever! (Zero Emissions)
So... reduce the cost of making steel and get fresh new cement for free? That's a win-win.

[kach22i]

Found this video too late in the morning, gotta run - will watch soon.

Thanks for post it.