Given the task definition, example input & output, solve the new input case.
You will be given a topic and an argument. Decide the argument's stance towards that topic. The argument's stance is in favor or against the topic. If the argument supports that topic, answer with "in favor"; otherwise, if the argument opposes the topic, answer with "against".
Example: topic: Nuclear energy
argument: Nuclear energy can reduce materials available for weapons-use.
Output: in favor
The given argument is in favor of nuclear energy.

New input case for you: topic: Carbon capture and storage
argument: Climate change is best solved by energy efficiency, not CCS
Output:
against