Alot more than you think
Oh, you mean like the 1960s when we had rivers catch fire, giant rolling red clouds going along the ground from steel mills, smog so thick in some cities you could not see 100 feet and frequent...
More than me I NEED A SERIOUS ANSWER
the us pollutes about 54 billion in weight of trash , empty oil tanks, and more
alot. think about all the cars on at the same time.