How does gore establish his credibility on the subject of the global warming in this excerpt

He lists his involvement in climate change work.

Explanation:

Global warming has been among the discussed topics in the science industry, with many people across the globe. However, there are those who makes everything possible in their power to prevent the spread of global warming. However, an average person can only do little in alleviating the issue in different cases.

In the past centuries, the country only experienced one form of warming but the warming that is seen in the modern world is dangerous to the human. This is the reasons scientists across the globe are working towards burning all global warming contributors.

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