"Climate activist Greta Thunberg has joked that she is adopting a "net-zero" approach to cursing, an apparent response to criticism of her use of strong language at a demonstration earlier this week... On Monday, Thunberg joined other "Fridays for Future" activists at a demonstration at Festival Park in Glasgow, near the UN climate summit, where she once again mocked politicians for their inaction on climate. She said the politicians and delegates gathered at the COP talks were "pretending to take our future seriously." Over the weekend, the environmental campaigner received a rock star welcome when she was mobbed by supporters at Glasgow's Central Station... After traveling north from London by train, Thunberg appeared to be in good spirits, giving photographers a thumbs-up as she made her way through the station upon arrival, surrounded by police and fellow climate activists."