Support for Extinction Rebellion in the UK has quadrupled in the past nine days as public concern about the scale of the ecological crisis grows.
Since the wave of protests began more than a week ago, 30,000 new backers or volunteers have offered their support to the environmental activist group. In the same period it has raised almost £200,000 – mostly in donations of between £10 and £50 – reaching a total of £365,000 since January.
The group said the figures showed the public was waking up to the scale of the crisis, adding that pressure was growing on politicians to act.
“What this shows is that Extinction Rebellion has spoken to people who have been wanting to act on this for such a long time but haven’t known how,” said a spokesperson for the group. “The debate on this is over – ordinary people are now saying it is time for politicians to act with real urgency.”
The group said the number of people on the streets for the protests had dwindled from a high over the Easter bank holiday weekend but that the number of people who had signed up to support future demonstrations had risen from 10,000 before the protest to 40,000 by Wednesday morning.
The Extinction Rebellion spokesperson said the group was also becoming more diverse – attracting more working-class and black and minority ethnic supporters. “But that is definitely a work in progress – there is still more work to do in that area,” she added.
The figures came a day after Greta Thunberg, the 16-year-old Swedish student, who sparked a global youth-based movement when she began a “climate strike” outside Sweden’s parliament last year, visited Westminster.
In a speech to MPs, she said: “You lied to us. You gave us false hope. You told us that the future was something to look forward to. You don’t listen to the science because you are only interested in solutions that will enable you to carry on like before.”
Extinction Rebellion’s youth group wrote to MPs on Wednesday, as parliament restarted after the Easter break, pleading with them to act swiftly to address the crisis.
The letter states: “We are writing to ask you to hear the science, to feel the public’s change of heart and to act now to save our futures … Now the time has arrived to stand up and be counted – you are our elected representatives and we need your help.”
More than 1,000 Extinction Rebellion activists have been arrested in the past week in a campaign of mass non-violent direct action to highlight how little time there is to halt manmade ecological breakdown.
Protesters occupied four sites across the capital and staged acts of civil disobedience including blocking roads, disrupting a train line and conducting a protest at Heathrow.
On Tuesday, the group said it intended to carry out further action in the next few days – including blocking roads in and around the City of London on Thursday. It is debating how and when to stop this stage of the protests.
On Tuesday, senior Labour figures backed the protesters, likening them to the Chartists, suffragettes and anti-apartheid activists.
Speaking in response to an urgent question in the Commons, the shadow energy minister, Barry Gardiner said alongside the school strikes, the Extinction Rebellion protests were reminiscent of previous struggles.
“All of those victories were won by citizens uniting against injustice, making their voice heard. And Extinction Rebellion and the school climate strikers are doing just that,” he said.
Jon Ashworth, the shadow health secretary, came out to speak to the crowd, pledging to make climate change a central focus of Labour’s health and wellbeing policy and expressing his support for a citizens’ assembly.
Inside the chamber, the former Labour leader Ed Miliband said the government must declare a climate emergency and introduce a “green new deal”.
Miliband, who was the energy and climate change secretary under Gordon Brown, said the protesters were correct. “The truth is the planet is warming far faster than we are acting,” he said. “Climate change is not some theoretical future prospect, but is with us here and now.”
Responding for the government, Claire Perry, the energy minister, rejected the idea of a climate emergency – “I don’t know what that would entail” – and said she had reservations about the Extinction Rebellion protests.
She said though she was glad such arguments were being heard, they had caused “disruption for many hundreds and thousands of hard-working Londoners and they have required a heavy policing presence. I worry that many of the messages we are hearing ignore the progress that is being made, and as such make people fearful for the future rather than hopeful.”