Answer:
Non-renewable resources
Step-by-step explanation:
The resources that can not be regenerated are known as non-renewable resources. These are also considered as conventional sources of energy. For example, fossil fuels, coal, petroleum, and natural gas.
These resources are formed from the ancient plants and animals that were deposited millions of years back, which are collectively known as fossils. This burning up of fossil fuels produces a large amount of carbon into the atmosphere that affects the earth's global temperature.
Thus, these resources are limited in nature, so they must be used in a proper and limited way and also should be sustained for the future generation.