We do need to reduce our impact on the environment, there is no doubt about that but the Extinction Rebellion way is insanity, even if you ignore the return to the stone age madness what do you think 7bn people living off the land is going to do to "Gaia", how long will the worlds forests last with 7bn of us foraging for wood to burn? And what Carbon impact will that have?
Recognising our effect on the climate is good and proper, by the same token we also have to recognise that our modern technology industrialised world is infact what is saving the planet form us. From there we can work it out.