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5 votes
What device has made car emissions much cleaner?

automatic transmission

better wheels

tail pipes

catalytic converters

User Dodegaard
by
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1 Answer

2 votes

Answer:

automatic transmission

Step-by-step explanation:

An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in motor vehicles that does not require any driver input to change gears under normal driving conditions.

User Michele Palmia
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