An icy wind whips through the Leuna chemical park, an unmanageable network of pipes, halls and steaming chimneys, home to more than 100 companies. Andreas Wolf, white helmet, yellow safety vest, steers through the mud towards a building that was only recently completed. It's hardly bigger than a supermarket on the meadow and bears the number 6422. Iron containers are docked to it, pipes and cables are winding everywhere. A couple of electricians pull the final strings. Nothing spectacular for a chemical park like this – at first glance.

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