How can the use of footnotes enhance the credibility and readability of an essay on the topic of climate change?

The use of footnotes in an essay on climate change can enhance credibility by providing sources for information and data, which shows that the writer has done research and is knowledgeable about the topic. Footnotes can also improve readability by keeping the main text focused and concise, while still allowing for additional explanations or references to be included for interested readers.