A Decade of Climate Polarization on Brazilian YouTube using Language Models
Online platforms have become arenas for the public contestation of climate change, shaping how scientific knowledge, denial, and uncertainty are expressed and disputed. Yet longitudinal evidence remains limited for YouTube, especially for Portuguese-language discourse. Addressing this gap, we characterize how climate stances are expressed and contested over time in a large corpus of Portuguese-language YouTube comments retrieved through Brazil-oriented climate-related searches. To support this analysis in a noisy, imbalanced, and low-resource setting, we collect more than 240,000 comments posted between 2014 and 2024 and formulate stance detection as a three-way classification task (Belie...
| Authors | Daniel Morais, Diego H. M. Magalhaes, Gabriel H. Silva et al. |
|---|---|
| Primary category | cs.SI |
| Published | 18 August 2026 |
| Last updated at source | 18 August 2026 |
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