What can be shown, cannot be said.
Technology should serve both efficiency and ethics in mineral extraction.
释义：当运气不好的时候，即便是金子也会失去光辉；而好运来临时，即使是铁也会显得光彩夺目。
过去从未死去，甚至还未过去。
Sustainability is no longer optional—it's a business imperative.
La luz de Andalucía no se pinta, se escribe.