Answer to Question 1
Green beans are low acid, meaning their pH is above 4.6 . Therefore, they must be canned in the pressure canner, so that the high temperature destroys any spore-forming bacteria that might be present in low-acid foods. The water bath canner with its boiling water temperature would not be hot enough to destroy the spore-forming Clostridium botulinum without a decrease in pH.
Answer to Question 2
smell