Why is it impossible for exponential growth to happen forever?

Exponential growth cannot continue indefinitely due to the limitations imposed by finite resources and environmental constraints. As a population or system grows exponentially, it eventually encounters factors such as limited food, space, or other essential resources that restrict further growth. Additionally, increased competition, disease, and changes in the environment can lead to a decline in growth rates. Ultimately, exponential growth is unsustainable in the long term, leading to a leveling off or decline as the system reaches its carrying capacity.