The Oregon Institute petition and it's lying claim that "31,072 American scientists have signed a petition rejecting the assertion that global warming has reached a crisis stage and is caused by human activity" was used a demonstration of Lurgee's Paradigm (2), and so the whole article can be ignored as propoganda and / or very bad journalism.
Some 31,072 American scientists have signed a petition rejecting the assertion that global warming has reached a crisis stage and is caused by human activity.
“No such consensus or settled science exists,” said Arthur Robinson, founder and president of the Oregon Institute of Science and Medicine in the July issue of “Environment & Climate News.”
“As indicated by the petition text and signatory list, a very large number of American scientists reject” the hypothesis of human-caused global warming. (1)
1 - "31K scientists sign petition disputing global warming," unattributed article posted on the Daily Press website, 28th of July, 2008. (http://www.vvdailypress.com/news/petition_7737___article.html/scientists_31k.html)
2 - as described previously on lefthandpalm: http://lefthandpalm.blogspot.com/2008/05/lurgees-paradigm-iii-31000-scientists.html