Wrong carbon dioxide goes into the plants leaves and comes out as fresh air
The U.S emitted 5.1 billion metric tons of energy-related carbon dioxide, while the global emissions of energy-related carbon dioxide totaled 32.5 billion metric tons.
To the first one I think it is "hydrated" and the second one, I'm sorry but idk :(
Scientists who study the relationships among living organisms and their environment are called Ecologists.