The most important choice is the definition of the hours during which we want to avoid casting shadows on adjacent land — the «cut - off times». (lowtechmagazine.com)
That in turn can provide a good focus for reducing impacts of pollutants from adjacent land areas. (dotearth.blogs.nytimes.com)
Eventually some of the heat is released to the atmosphere and warms adjacent land masses. (insideclimatenews.org)