Of course, if you consider that oil shale mining has been going on for more than 50 years, and then you consider how the ash is currently deposited — scattered in a number of 100m hills, including one "mountain range" — and that in turn that ash has ceased to be deposited at the top of the hill but only at the base — it seems inexcusable, doesn't it?
Por supuesto, si consideras que la minería de esquisto bituminoso se ha realizado durante más de 50 años, y después consideras cómo se deposita actualmente la ceniza — esparcida en una cantidad de colinas de 100m, incluida una “cadena montañosa” — y que a la vez esa ceniza ha dejado de depositarse en la cima de la colina sino solamente en la base — parece inexcusable, ¿no es cierto?