Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?

If all the waste we generate is biodegradable, will this have no impact on the environment?

What are the problems caused by the non-biodegradable wastes that we generate?

What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?

Will the impact of removing all the organisms in trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?