https://www.sciencedaily.com/releases/2011/09/110913092418.htm
Methodology applied to historical walls may explain why moss gathers and how paint blackens |...
For the correct restoration of deteriorated works of cultural heritage, it helps to know what causes the degradation in the first place. There are studies that...
https://www.latimes.com/archives/la-xpm-1996-08-09-me-33987-story.html
Blaze Blackens 5 Acres in Los Padres Forest - Los Angeles Times
Aug 9, 1996 - A fire burned about five acres in the Los Padres National Forest north of Ojai Thursday, authorities said.
5 acreslos padresblazeblackensforest
https://www.nhpr.org/2006-03-16/oil-pipeline-spill-blackens-alaskas-north-slope
Oil Pipeline Spill Blackens Alaska's North Slope | New Hampshire Public Radio
May 15, 2022 - Workers are cleaning up more than 200,000 gallons of oil that leaked last week from a pipeline in Prudhoe Bay, Alaska. It's the largest oil spill ever on...
oil pipeline