читал Lujan v. Defenders of Wildlife (http://en.wikisource.org/wiki/Lujan_v._Defenders_of_Wildlife) (+ позиция Робертса - http://www.law.com/jsp/article.jsp?id=1122627917320)
много думал :)
(есть еще http://en.wikipedia.org/wiki/Massachusetts_v._Environmental_Protection_Agency)