Re:America's Biggest Asphalt Plant Is Shutting
by Reason077 on Sunday February 05, 2017 @07:32PM
(#13575632)
The use of coal ash ("fly ash") in concrete is generally considered a good thing.
It's making use of a waste product (from coal power plants) that otherwise gets dumped into the environment where it can pollute soil and waterways.
The problem with concrete is that they cook it with nasty stuff like coal ash. Plants spew all sorts of particulate pollution and mercury. Plus they frequently pollute water sources with stuff like sulfuric acid.