Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. 'Extinction Rebellion' Dubbed Cult, But Supporters Say Radical Change Needed Jamie Dettmer They are seen as the shock troops of a burgeoning direct-action environmental movement. Earlier this year, members of Extinction Rebellion brought the center of London and some other major British towns to a standstill by barricading bridges, standing on top of trains, and blocking major thoroughfares and crossroads. Extinction Rebellion (XR), a campaign of civil disobedience born in Britain and aiming to address a worldwide climate crisis, has been endorsed by Swedish climate activist Greta Thunberg, the teenage poster child of environmentalism. XR has pledged to cause more disruption, arguing that governments are not doing enough to stop the "climate emergency." The group, which is spawning similar campaigns in the United States and Australia, says climate activists have no choice but to take matters into their own hands. It demands that governments prevent further biodiversity loss and commit to producing net-zero greenhouse gases by 2025. Otherwise, XR says, there will be a mass extinction of life forms on the planet within the lifetimes of the demonstrators themselves. The group's next target is next month's star-studded London Fashion Week. Activists have promised to shut down the five-day runway event in a bid to raise awareness of the environmental damage caused by the fashion industry. .