Analyzing an argument

Trashing the Grand Canyon. Los Amgeles Times. Retrieved November 14, 2011, from http://www.latimes.com
In this article, the author claimed that the money given by some organizations to the national park might have the negative impact on the park policy. It is a claim of policy, which appeals to reason. The author mentionned the banish of selling water bottles in the Grand Cayon park can diminish the amount of the trash in the park since plastic bottles are a biggest single source of trash in the park. However, this solution might not be applied since the patron of this national park is afraid of loosing sponsering from Coca-cola. The evidence is come from the email leaking to NY Times. This email metionned that the Park patron will hold off the decision until getting sponsoring from Coca-cola. This is a weak evidence since the source of the email was not indentified; and the information cited was not justified. Therefore the evidence is not credible.