1-cuts and wounds should not come in contact with soil because the bacteria and micro organisms enter into the body through cuts and wounds and cause infection.
2-nitrogen is already a part of air naturally, rainfall .
meaning of anthropogenic is originating in human activity
sources of anthropogenic nitrogen are pesticides, animal manures and commercial fertilizers.
3-pasteurization is the only method / process found by louis pasteur and it is named after his work on pasteurization process.