Given the Target and Argument texts detect the stance that the argument has towards the topic. There are three types of stances "in favor", "against", and "neutral". 

Q: Topic: Reforestation as a solution to global warming
 Argument: Reforestation can result in release of greenhouse gas Methane.

A: against
****
Q: Topic: Solar energy
 Argument: Producing solar cells need not use fossil fuel energy.

A: in favor
****
Q: Topic: Cluster bomb ban
 Argument: Cluster bomb ban will put US soldiers at risk.

A:
against
****