Part of the GED Science test is Earth Science. To learn more about this topic, one of the concepts you need to learn is renewable and non-renewable natural resources.
There are things that people use every day that they thought would be there forever. That is why some people abuse and waste these resources on useless things. An example for this is fossil fuel where gasoline and diesel are derived. According to some estimates, by 2025 all of the current fossil fuel reserves are going to be drained. That is bad news if you own a car since, without fossil fuels, there won’t be gasoline or diesel to run it.
https://www.testpreptoolkit.com/ged-exam/renewable-vs-nonrenewable-natural-resources/