The majority of the CO2 footprint of any product is in the extraction of raw materials, the transportation and the production of engines, generators and gearboxes? It therefore takes many years before such a new engine can be "green" at all!
Why then, are we investing such huge amounts of money and efforts to manufacture hundreds of thousands of new ones? Even a child can understand that it is therefore better to (re-)use products that have already been manufactured for a longer period of time, than to produce millions of new ones and to early replace them ?!
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