The author never really shows his credibility, but he does use many familiar and important names in his paper. Al Gore’s name was used many times with correlation to the climate change and how it has been brought up to the population. Many people see Gore as a credible source, because he has been the Vice President and he has had many other high positions in the government. Credibility doesn’t always have to come from people, it can also come from companies and groups. In this article they use NASA as a known source that people trust. They hope that because it is a big governmental company people will believe what is being said is true, trusting the opinions of the
