if humans run out of the following resources, coal resource would be most difficult to replace because it is non-renewable resources.
Petroleum is a nonrenewable energy source like all fossil fuels. As a result, it is a resource that cannot be replenished as quickly as people consume up the available supply. There won't be enough gasoline to drive all the cars in the globe if petroleum stocks start to run out, which presents a challenge for humans.
In the course of a human lifetime, nonrenewable resources cannot be replenished. It takes a very long time for these resources to form. These resources can run out if we utilize them too rapidly because there isn't enough time to replenish them. Coal, oil, and natural gas are the three categories of nonrenewable resources.
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