In 1999, scientists spread 45 tons of calcium over a New Hampshire forest damaged by acid rain; damaged maple crowns recovered, and maple-seedling survival rose from 10.2% to 36.6% | World News
An AI-generated image showing how in 1999, researchers used a helicopter to spread about 45 tons of wollastonite across Hubbard Brook’s Watershed 1 to restore calcium lost from the forest soil. Credits – Google Gemini Acid rain spent much of the twentieth century quietly stripping something out of northeastern American soils that nobody could easily…