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". 

Topic: Oil sands
 Argument: Oil sands are too economically important to abandon.
in favor

Topic: Carbon emissions trading
 Argument: Emissions trading encourages investments in best technologies.
in favor

Topic: Kyoto Protocol
 Argument: Voluntary emissions reduction schemes have low participation levels.

against