What is the process of the depletion of the ozone layer called?

At one trophic level,an average of $10 \%$ of the energy taken is turned into its own body and made available for the next level of consumers. What happens to the rest of $90 \%$ of the energy?

What would happen if the number of carnivores decreases in an ecosystem?

Disposable plastic plates should not be used because

Which organisms represent the second trophic level in a food chain?

Explain some harmful effects of agricultural practices on the environment.