Summary:
- Energy resources can be put into two categories—renewable or nonrenewable.
- Renewable resources can be replaced as quickly as they are used.
- The difference between nonrenewable and renewable resources is like the difference between ordinary batteries and rechargeable ones.
- Rechargeable batteries are renewable because they can be refilled with energy.
- Even renewable resources can be used unsustainably.
- The cost of renewable resources will go down relative to fossil fuels as we use fossil fuels up.
- Energy resources can be put into two categories—renewable or nonrenewable.
- Renewable resources can be replaced as quickly as they are used.
- The difference between nonrenewable and renewable resources is like the difference between ordinary batteries and rechargeable ones.
- In this way, the energy in the rechargeable batteries is renewable.
- Rechargeable batteries are renewable because they can be refilled with energy.
- Even renewable resources can be used unsustainably.
- The cost of renewable resources will go down relative to fossil fuels as we use fossil fuels up.