The current paper aims to understand green behavior from the perspective of Gen Z, the emerging consumers of a new tech-savvy world, driven by social media. We offer a novel definition of green behavior via the lens of consumer activism in the context of social media, the basis for purchase decision-making by Gen Z. Undertaking a review of extant literature, we also identify a conceptual model for green behavior as a form of consumer activism in social media. We identify perceived environmental transgression as a precursor to green behavior. We also study the less-studied moderators of green stigma and green skepticism, which are important both in the context of Gen Z as well as social media.