Carbon neutral is a term used to describe carbon-based fuel that when burned will not increase carbon dioxide in the atmosphere. these fuels neither contribute to nor reduce the amount carbon so the carbon will remain the same.
so I think carbon neutral is good for the environment but not us humans
Droughts is your answer because flooded their dam by destroying it and put malaria in the water which flooded.
The answer of 14. Is D. Nansen and the answer of 12. Is B.