Even if we stop fossil fuels tomorrow oil is here to stay. How long would it take to develop new aircraft? How long would it take to stop all industries from us

Even if we stop fossil fuels tomorrow oil is here to stay. How long would it take to develop new aircraft? How long would it take to stop all industries from using plastic, and all agriculture from using petrochemical fertilizer? Not all governments are in on some grand conspiracy. Many governments would greatly benefit. But to make the switch now would mean severe damage to their economy and wellbeing. Even medicine relies heavily on petrochemicals inside and outside of the hospital. Even if a country chooses to sacrifice itself to benefit the common good, it might not be enough to affect actual environmental change.