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".

topic: Hydrogen vehicles
argument: Electric car battery technology and costs are improving rapidly
against

topic: Falkland Islands, return of
argument: Relations with Argentina are not important to Britain.
against

topic: Solar energy
argument: The recovery/payback period can be very short.

in favor