We collect the comments that including amazon forest, amazon forest fire and amazon fire climate change key sentences, and then build the sentiment analysis model to predict their sentiment score. ( lower score means more pessimistic, higher score means more optimistic)
"Citation: Go, A., Bhayani, R. and Huang, L., 2009. Twitter sentiment classification using distant supervision. CS224N Project Report, Stanford, 1(2009), p.12."
Wei-Cheng Lin, Ssu-Yu Chen, Ruben Gonzalez.