Do First - Environmental Pollution

Four friends were arguing about the source of pollution that harms the environment. They each had different ideas about where the pollution comes form that harms the environment.

Leila: I think harm to the environment comes from human activities.

Purity: I think harm to the environment comes from natural processes.

Wyatt: I think harm to the environment both human activities and natural process.

Noana: I do not think it matters if harm to the environment comes from humans or natural processes. It depends on whether the source is non-biodegradeable.

Which friend do you think has the best idea about sources of harm to the environment. Explain why you think that is the best idea.