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The Leaf doesn't use any rare earths at all. Typical AC motors are all copper windings. Lithium batteries are generally not toxic at all (unlike lead acid), and the materials are very valuable, so like lead acid, there will be a very high rate of recycling.
EV's use no oil for engine lubrication, so no waste oil or waste filters, etc. Since electric motors will last much longer than ICE's -- like up to 1,000,000 miles, the lifespan of the car will be limited by the chassis, and not the motor.
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