"Acid Rain and Our Nation's Capital: A Guide to Effects on Buildings and Monuments" by Elaine McGee is a scientific publication likely written in the late 20th century. This guide provides an in-depth examination of acid rain, particularly how it affects historical buildings and monuments in Washington, D.C. It aims to educate readers on the detrimental impacts of acid precipitation, a significant environmental concern, on architectural heritage. The book discusses the chemical properties of acid rain, including its origins and effects on various types of stone, such as marble and limestone, which are commonly used in monuments. It begins by defining acid precipitation and detailing its causes, with particular emphasis on urban pollution from vehicles and industrial activities. The guide includes a walking tour of notable buildings in the nation's capital, highlighting specific examples where acid rain has caused visible deterioration. Through this tour, readers can observe signs of damage and understand the importance of preserving these historical structures amidst ongoing environmental challenges. (This is an automatically generated summary.)