Answer:
"Fairytales of eternal economic growth" is a phrase used by Greta Thunberg to refer to the belief that economic growth can continue indefinitely without any negative consequences for the environment.
In economics, economic growth is typically measured by an increase in a country's gross domestic product (GDP), which is the total value of goods and services produced within a country.
However, this measure does not take into account the environmental costs of economic activity, such as the depletion of natural resources and the emission of greenhouse gases.
By using the phrase "fairytales of eternal economic growth," Thunberg is calling attention to the need for a more sustainable approach to economic development that recognizes the value of natural ecosystems and the importance of protecting the environment.