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: Geoengineering, solar shading
 Argument: Solar shading can effectively and rapidly reverse global warming.

A: in favor
****
Q: Topic: Solar energy
 Argument: Solar energy does not damage air quality.

A: in favor
****
Q: Topic: Algae biofuel
 Argument: Algae biofuel is a renewable resource.

A:
in favor
****