Answer:
I saw this question on my recent test
B. Both were common governments for early river valley civilizations.
This was my answer and Got it right. Hope This helps you! :0) lol
High levels of dissolved oxygen
Answer: magazines, radio, television, and the Internet
D Easy I think because all the others are posotive
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