Greta with a rifle (actually Emmy Slinge)

Notes:

This is a screenshot from a video of Emmy Slinge ( https://twitter.com/eslinge/status/1203308376211505152 ). Some people posted it mistaking her with Greta Thunberg. It was also published by some media (e.g. https://www.usanews.net/politics/The-picture-goes-round-the-world-Is-it-Greta-h12869.html ) and people debunking the mistake.