Stop oil.
And farewell to all the modern conveniences they take it for granted.
All of what they use for their "movement", heavily reliant on the usage of resources and materials they are supposed to hate.
Their home, food, clothing, footwear.
As well as those IT tools in their pocket.
They all come from modern technologies and industries they swear.
Ignorant and tunnel visioned brats that won't really go anywhere.