Someone else posted this below https://news.ycombinator.com/item?id=32858258 https://news.ycombinator.com/item?id=32858258 that is not mentioned in the wikipedi

Someone else posted this below https://news.ycombinator.com/item?id=32858258 https://news.ycombinator.com/item?id=32858258 that is not mentioned in the wikipedia page: > Falling levels of air pollution drove decline in California’s tule fog