Environmental Science
One greenhouse gas contributes 14% to total global warming and another contributes 6%. These are respectively identified as

CFCs and N2O
Methane and CO2
N2O and CO2
CFCs and CO2
Methane and CFCs

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Environmental Science
Which one is true?

commensalism when none of the interacting populations affect each other
symbiosis when the interaction is useful to both the populations
commensalism when the interaction is useful to both the populations
symbiosis when neither population affects each other

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