Topic 2: Moses and the 10 plagues: Caused by water pollution?

As far as I'm concerned, the 10 plagues are the following:

1. River water turned to blood
2. Frogs
3. Gnats
4. Flies
5. Death of livestock
6. Boils
7. Hail
8. Locusts
9. Darkness
10. Death of the firstborn

I am not much of a religious person and I take facts according to evidence. Since it has been somewhat proven, or at least trying to prove, that most of the ten plagues were caused by polluted water.

In the past, people were not exactly educated like how we are now, and there were not much of technology to aid them in their studies, therefore many myths and beliefs were formed. An example was the 10 plagues. From my point of view, most of the 10 plagues were definitely caused by water pollution due to the research on the scientist's part. But people in those times couldnt find an answer to the phenomenon, therefore have come up with the 10 plagues to convince themselves.