Can be a number of things, rain fall quota, climate, population, vegetation..any of those.
Protect yourself by following these steps: Treat all blood and body fluid spills as if they were infectious. When providing first aid or CPR, protect yourself first, then treat the victim second. Wear appropriate personal protective equipment: gloves, goggles, etc. as required by the accident.
Enzymes. There are 3 main types: Peptidase, Lipase, and amylase :) hope that helps! I'm learning that stuff too :)
The soil on the valley floor because it would not have runoff. Hope this helps.
