Age: ON A wide, flat plain in Germany’s depressed north-east, one of the keys to our future has begun turning. Beside a giant power station known as Schwarze Pumpe (Black Pump), a small plant has begun to capture the carbon released when brown coal is turned into electricity, ultimately to store it underground. In Australia, the world’s biggest coal exporter, carbon capture and storage is endlessly debated, praised and condemned. In Germany, in a modest way, it has begun. …