[bray]

The scrubbers did not do anything since acid rain was a hoax. There never was acid rain killing trees it turned out it was a microscopic bacteria killing the trees.

The trillions referred to boondoggle solutions to fake science.

[palmer]

The scrubbers are very simple, they remove acidic gases by passing the gas through limestone. The pH has risen over time as more scrubbing has been done: https://www.des.nh.gov/organization/divisions/water/wmb/documents/acid-rain-report-summary.pdf

Acid rain might not have been as serious for trees or other wildlife as claimed. But the fact that it was more acidic and is now less acidic after scrubbing is a fact.