To play devil’s advocate, what is the tipping point for “is this sustainable for humanity” ?

For example, do I stop using my cellphone and computer? There is no way the world could support the power, the minerals found within computing devices, the labour to produce 7 billion cellphones, let alone the towers required to operate them.

I think people need to make more informed choices about their actions, the food they consume, the materials they use, as well, but we need to retrain people into believing new is not necessarily better and comes at a higher global cost.