Rotation. A word with a simple definition, but with a meaning that has a big effect on our everyday lives.​ ⚙️​ We’re counting on trams, subway trains and buses to take us through our cities safely and sustainably. We trust water treatment facilities to supply us with fresh water, and the food industry to safeguard us from allergens and bacteria. We expect wind farms to keep our lights on, and cars to be electric. There are a million other everyday rotation needs to satisfy – and a planet to tak