No one taught you these things? Good to know that it is not a widespread delusion at least.
Stress CAN and DOES increase incidents of disease - but the disease itself is usually a microbial pathogen - or a somatic mutation causing unregulated cellular division (i.e. cancer).
Despite you delusions about what God does or does not do or want - wild animals DO get cancer - and it is not because their soul is not right with God - or because they live under a great deal of stress - but because over the span of their life they had somatic mutations in some cell lines that made those cells cancerous.
So how does pollution cause cancer in your model?
Does environmental pollutants increase stress? Or do they increase somatic mutations?