Context: And in the 80s the acid rain scare ( all the trees on the planet would be dead in 10 years and everyone exposed to the rain would would contract skin cancer or worse ) . Thank god we had Reagan who refused to invest billions of dollars until a group of studies were completed although the media tried to crucify him as an anti - environmental monster for waiting for an answer from real science rather than blindly accept politically motivated junk science . We all know what happened to the new ice age , temperatures returned to normal and we also know that all the trees are still here none the worse for wear .
Question Was acid rain a legitimate concern ?
Possible answers:

1). Acid rain had a devastating impact
2). Acid rain is still a major concern
3). Acid rain had less of an impact as suspected
4). Acid rain damages were underestimated
The answer:
3).