Story and comics created by CCFamily.
What is an ecosystem? An ecosystem means an ecological system. It is a natural unit consisting of living organisms (e.g. plants and animals), and physical elements (e.g. sun, water and air). The plants and animals in a balanced ecosystem have close relationships and they depend on each other to survive.
But human activities are polluting the environment and damaging the ecosystem. This causes the extinction of some plants and animals. In turn, it would threaten the survival of other organisms as well. We must go green to protect the ecosystem. Are you willing to help?
Reference: Cambridge Dictionaries Online (Learners')